157928690 has 16 divisors (see below), whose sum is σ = 284468760. Its totient is φ = 63127680.

The previous prime is 157928681. The next prime is 157928699. The reversal of 157928690 is 96829751.

It is an interprime number because it is at equal distance from previous prime (157928681) and next prime (157928699).

It can be written as a sum of positive squares in 4 ways, for example, as 144889369 + 13039321 = 12037^2 + 3611^2 .

It is a super-2 number, since 2×157928690² = 49882942250232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157928699) 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, 12470 + ... + 21710.

Almost surely, 2^157928690 is an apocalyptic number.

157928690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157928690 is a deficient number, since it is larger than the sum of its proper divisors (126540070).

157928690 is a wasteful number, since it uses less digits than its factorization.

157928690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10957.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 157928690 is about 12566.9682103521. The cubic root of 157928690 is about 540.5306740219.

The spelling of 157928690 in words is "one hundred fifty-seven million, nine hundred twenty-eight thousand, six hundred ninety".