157996998 has 24 divisors (see below), whose sum is σ = 346663200. Its totient is φ = 51998544.

The previous prime is 157996973. The next prime is 157997003. The reversal of 157996998 is 899699751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54133 + ... + 56976.

It is an arithmetic number, because the mean of its divisors is an integer number (14444300).

Almost surely, 2^157996998 is an apocalyptic number.

157996998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

157996998 is an abundant number, since it is smaller than the sum of its proper divisors (188666202).

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

157996998 is a wasteful number, since it uses less digits than its factorization.

157996998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111196 (or 111193 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 63.

The square root of 157996998 is about 12569.6856762610. The cubic root of 157996998 is about 540.6085936772.

The spelling of 157996998 in words is "one hundred fifty-seven million, nine hundred ninety-six thousand, nine hundred ninety-eight".