Base | Representation |
---|---|
bin | 1000110110010… |
… | …00100010111110 |
3 | 12011122212010000 |
4 | 10123020202332 |
5 | 123000044013 |
6 | 11210455130 |
7 | 1560605652 |
oct | 433104276 |
9 | 164585100 |
10 | 74221758 |
11 | 389949a6 |
12 | 20a344a6 |
13 | 124b9300 |
14 | 9c00a62 |
15 | 67b1973 |
hex | 46c88be |
74221758 has 60 divisors (see below), whose sum is σ = 180155448. Its totient is φ = 22829040.
The previous prime is 74221757. The next prime is 74221787. The reversal of 74221758 is 85712247.
It is a super-2 number, since 2×742217582 = 11017738721221128, which contains 22 as substring.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (74221753) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 26023 + ... + 28733.
Almost surely, 274221758 is an apocalyptic number.
74221758 is a gapful number since it is divisible by the number (78) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 74221758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90077724).
74221758 is an abundant number, since it is smaller than the sum of its proper divisors (105933690).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
74221758 is a wasteful number, since it uses less digits than its factorization.
74221758 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2751 (or 2729 counting only the distinct ones).
The product of its digits is 31360, while the sum is 36.
The square root of 74221758 is about 8615.2050468924. The cubic root of 74221758 is about 420.2526031469.
It can be divided in two parts, 7422 and 1758, that added together give a triangular number (9180 = T135).
The spelling of 74221758 in words is "seventy-four million, two hundred twenty-one thousand, seven hundred fifty-eight".
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