157489988 has 6 divisors (see below), whose sum is σ = 275607486. Its totient is φ = 78744992.

The previous prime is 157489909. The next prime is 157489991. The reversal of 157489988 is 889984751.

It can be written as a sum of positive squares in only one way, i.e., 153561664 + 3928324 = 12392^2 + 1982^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19686245 + ... + 19686252.

It is an arithmetic number, because the mean of its divisors is an integer number (45934581).

Almost surely, 2^157489988 is an apocalyptic number.

It is an amenable number.

157489988 is a deficient number, since it is larger than the sum of its proper divisors (118117498).

157489988 is a wasteful number, since it uses less digits than its factorization.

157489988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39372501 (or 39372499 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 59.

The square root of 157489988 is about 12549.5015040439. The cubic root of 157489988 is about 540.0297057275.

The spelling of 157489988 in words is "one hundred fifty-seven million, four hundred eighty-nine thousand, nine hundred eighty-eight".