157992690 has 16 divisors (see below), whose sum is σ = 379182528. Its totient is φ = 42131376.

The previous prime is 157992689. The next prime is 157992691. The reversal of 157992690 is 96299751.

It is an interprime number because it is at equal distance from previous prime (157992689) and next prime (157992691).

It is a super-2 number, since 2×157992690² = 49923380186872200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157992691) 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, 2633182 + ... + 2633241.

It is an arithmetic number, because the mean of its divisors is an integer number (23698908).

Almost surely, 2^157992690 is an apocalyptic number.

157992690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157992690 is an abundant number, since it is smaller than the sum of its proper divisors (221189838).

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

157992690 is a wasteful number, since it uses less digits than its factorization.

157992690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266433.

The product of its (nonzero) digits is 306180, while the sum is 48.

The square root of 157992690 is about 12569.5143104258. The cubic root of 157992690 is about 540.6036801598.

The spelling of 157992690 in words is "one hundred fifty-seven million, nine hundred ninety-two thousand, six hundred ninety".