157893640 has 32 divisors (see below), whose sum is σ = 357329880. Its totient is φ = 62789632.

The previous prime is 157893623. The next prime is 157893641. The reversal of 157893640 is 46398751.

It can be written as a sum of positive squares in 4 ways, for example, as 154703844 + 3189796 = 12438^2 + 1786^2 .

It is a super-3 number, since 3×157893640³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (157893641) 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, 4489 + ... + 18328.

Almost surely, 2^157893640 is an apocalyptic number.

157893640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157893640 is an abundant number, since it is smaller than the sum of its proper divisors (199436240).

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

157893640 is a wasteful number, since it uses less digits than its factorization.

157893640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23001 (or 22997 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 157893640 is about 12565.5736040978. The cubic root of 157893640 is about 540.4906833952.

The spelling of 157893640 in words is "one hundred fifty-seven million, eight hundred ninety-three thousand, six hundred forty".