157977998 has 8 divisors (see below), whose sum is σ = 242008992. Its totient is φ = 77308336.

The previous prime is 157977979. The next prime is 157978013. The reversal of 157977998 is 899779751.

157977998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 157977998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840215 + ... + 840402.

It is an arithmetic number, because the mean of its divisors is an integer number (30251124).

Almost surely, 2^157977998 is an apocalyptic number.

157977998 is a deficient number, since it is larger than the sum of its proper divisors (84030994).

157977998 is a wasteful number, since it uses less digits than its factorization.

157977998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680666.

The product of its digits is 10001880, while the sum is 62.

The square root of 157977998 is about 12568.9298669378. The cubic root of 157977998 is about 540.5869224320.

The spelling of 157977998 in words is "one hundred fifty-seven million, nine hundred seventy-seven thousand, nine hundred ninety-eight".