| Base | Representation |
|---|---|
| bin | 101010110111110… |
| … | …0010100011110000 |
| 3 | 10201020211200020220 |
| 4 | 1111233202203300 |
| 5 | 10421230310210 |
| 6 | 354424333040 |
| 7 | 50435160264 |
| oct | 12557424360 |
| 9 | 3636750226 |
| 10 | 1438525680 |
| 11 | 6790126a9 |
| 12 | 341914180 |
| 13 | 19c04a237 |
| 14 | d90a00a4 |
| 15 | 86454c70 |
| hex | 55be28f0 |
1438525680 has 80 divisors (see below), whose sum is σ = 4467464064. Its totient is φ = 382915840.
The previous prime is 1438525679. The next prime is 1438525681. The reversal of 1438525680 is 865258341.
1438525680 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (1438525679) and next prime (1438525681).
It is a tau number, because it is divible by the number of its divisors (80).
It is a super-2 number, since 2×14385256802 = 4138712264038924800, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1438525681) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135775 + ... + 145985.
Almost surely, 21438525680 is an apocalyptic number.
1438525680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1438525680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2233732032).
1438525680 is an abundant number, since it is smaller than the sum of its proper divisors (3028938384).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1438525680 is a wasteful number, since it uses less digits than its factorization.
1438525680 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10814 (or 10808 counting only the distinct ones).
The product of its (nonzero) digits is 230400, while the sum is 42.
The square root of 1438525680 is about 37927.9010755934. The cubic root of 1438525680 is about 1128.8577174371.
The spelling of 1438525680 in words is "one billion, four hundred thirty-eight million, five hundred twenty-five thousand, six hundred eighty".
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