157707640 has 32 divisors (see below), whose sum is σ = 375716880. Its totient is φ = 59372032.

The previous prime is 157707629. The next prime is 157707647. The reversal of 157707640 is 46707751.

It is a self number, because there is not a number n which added to its sum of digits gives 157707640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157707647) 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, 115282 + ... + 116641.

Almost surely, 2^157707640 is an apocalyptic number.

157707640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157707640 is an abundant number, since it is smaller than the sum of its proper divisors (218009240).

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

157707640 is a wasteful number, since it uses less digits than its factorization.

157707640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231951 (or 231947 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 157707640 is about 12558.1702488858. The cubic root of 157707640 is about 540.2783658535.

The spelling of 157707640 in words is "one hundred fifty-seven million, seven hundred seven thousand, six hundred forty".