157198878 has 12 divisors (see below), whose sum is σ = 340597608. Its totient is φ = 52399620.

The previous prime is 157198871. The next prime is 157198883. The reversal of 157198878 is 878891751.

It is a super-2 number, since 2×157198878² = 49422974488917768, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157198871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4366618 + ... + 4366653.

It is an arithmetic number, because the mean of its divisors is an integer number (28383134).

Almost surely, 2^157198878 is an apocalyptic number.

157198878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

157198878 is an abundant number, since it is smaller than the sum of its proper divisors (183398730).

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

157198878 is a wasteful number, since it uses less digits than its factorization.

157198878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8733279 (or 8733276 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 54.

The square root of 157198878 is about 12537.8976706623. The cubic root of 157198878 is about 539.6967639065.

The spelling of 157198878 in words is "one hundred fifty-seven million, one hundred ninety-eight thousand, eight hundred seventy-eight".