157672640 has 56 divisors (see below), whose sum is σ = 395234160. Its totient is φ = 59747328.

The previous prime is 157672631. The next prime is 157672643. The reversal of 157672640 is 46276751.

It is a super-2 number, since 2×157672640² = 49721322809139200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 157672594 and 157672603.

It is not an unprimeable number, because it can be changed into a prime (157672643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6887 + ... + 19046.

Almost surely, 2^157672640 is an apocalyptic number.

157672640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157672640 is an abundant number, since it is smaller than the sum of its proper divisors (237561520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157672640 is a wasteful number, since it uses less digits than its factorization.

157672640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25969 (or 25959 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 157672640 is about 12556.7766564513. The cubic root of 157672640 is about 540.2383949684.

The spelling of 157672640 in words is "one hundred fifty-seven million, six hundred seventy-two thousand, six hundred forty".