157217988 has 48 divisors (see below), whose sum is σ = 382667264. Its totient is φ = 50181120.

The previous prime is 157217987. The next prime is 157218011. The reversal of 157217988 is 889712751.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (157217987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33906 + ... + 38262.

Almost surely, 2^157217988 is an apocalyptic number.

It is an amenable number.

157217988 is an abundant number, since it is smaller than the sum of its proper divisors (225449276).

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

157217988 is a wasteful number, since it uses less digits than its factorization.

157217988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492 (or 4490 counting only the distinct ones).

The product of its digits is 282240, while the sum is 48.

The square root of 157217988 is about 12538.6597369894. The cubic root of 157217988 is about 539.7186325683.

The spelling of 157217988 in words is "one hundred fifty-seven million, two hundred seventeen thousand, nine hundred eighty-eight".