| Base | Representation |
|---|---|
| bin | 1100001011011… |
| … | …00110001000100 |
| 3 | 21010020010120200 |
| 4 | 12011230301010 |
| 5 | 202123014010 |
| 6 | 14045330500 |
| 7 | 2350215633 |
| oct | 605546104 |
| 9 | 233203520 |
| 10 | 102157380 |
| 11 | 52735396 |
| 12 | 2a266a30 |
| 13 | 1821a770 |
| 14 | d7d351a |
| 15 | 8e7dcc0 |
| hex | 616cc44 |
102157380 has 144 divisors (see below), whose sum is σ = 337100400. Its totient is φ = 24892416.
The previous prime is 102157339. The next prime is 102157387. The reversal of 102157380 is 83751201.
102157380 is a `hidden beast` number, since 10 + 2 + 1 + 573 + 80 = 666.
It can be written as a sum of positive squares in 8 ways, for example, as 4384836 + 97772544 = 2094^2 + 9888^2 .
It is a super-2 number, since 2×1021573802 = 20872260576928800, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (102157387) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 348514 + ... + 348806.
It is an arithmetic number, because the mean of its divisors is an integer number (2340975).
Almost surely, 2102157380 is an apocalyptic number.
102157380 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 102157380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168550200).
102157380 is an abundant number, since it is smaller than the sum of its proper divisors (234943020).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
102157380 is a wasteful number, since it uses less digits than its factorization.
102157380 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 470 (or 465 counting only the distinct ones).
The product of its (nonzero) digits is 1680, while the sum is 27.
The square root of 102157380 is about 10107.2934062488. The cubic root of 102157380 is about 467.4730536291.
The spelling of 102157380 in words is "one hundred two million, one hundred fifty-seven thousand, three hundred eighty".
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