| Base | Representation |
|---|---|
| bin | 10010110010101… |
| … | …11101110100000 |
| 3 | 101222122020021200 |
| 4 | 21121113232200 |
| 5 | 310324130403 |
| 6 | 23350521200 |
| 7 | 3622652352 |
| oct | 1131275640 |
| 9 | 358566250 |
| 10 | 157645728 |
| 11 | 80a94629 |
| 12 | 44966200 |
| 13 | 26877cc6 |
| 14 | 16d190d2 |
| 15 | dc8eca3 |
| hex | 9657ba0 |
157645728 has 72 divisors (see below), whose sum is σ = 450017568. Its totient is φ = 52348032.
The previous prime is 157645727. The next prime is 157645753. The reversal of 157645728 is 827546751.
157645728 is a `hidden beast` number, since 1 + 5 + 76 + 4 + 572 + 8 = 666.
157645728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (72).
It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.
It is not an unprimeable number, because it can be changed into a prime (157645721) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87525 + ... + 89307.
It is an arithmetic number, because the mean of its divisors is an integer number (6250244).
Almost surely, 2157645728 is an apocalyptic number.
157645728 is a gapful number since it is divisible by the number (18) 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 157645728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225008784).
157645728 is an abundant number, since it is smaller than the sum of its proper divisors (292371840).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
157645728 is a wasteful number, since it uses less digits than its factorization.
157645728 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2106 (or 2095 counting only the distinct ones).
The product of its digits is 470400, while the sum is 45.
The square root of 157645728 is about 12555.7049981273. The cubic root of 157645728 is about 540.2076567610.
The spelling of 157645728 in words is "one hundred fifty-seven million, six hundred forty-five thousand, seven hundred twenty-eight".
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