157899638 has 16 divisors (see below), whose sum is σ = 270073440. Its totient is φ = 68589696.

The previous prime is 157899631. The next prime is 157899653. The reversal of 157899638 is 836998751.

157899638 = 1717² + 1718² + ... + 1768².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157899631) 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, 178178 + ... + 179061.

It is an arithmetic number, because the mean of its divisors is an integer number (16879590).

Almost surely, 2^157899638 is an apocalyptic number.

157899638 is a deficient number, since it is larger than the sum of its proper divisors (112173802).

157899638 is a wasteful number, since it uses less digits than its factorization.

157899638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357271.

The product of its digits is 3265920, while the sum is 56.

The square root of 157899638 is about 12565.8122698057. The cubic root of 157899638 is about 540.4975272894.

The spelling of 157899638 in words is "one hundred fifty-seven million, eight hundred ninety-nine thousand, six hundred thirty-eight".