157977406 has 16 divisors (see below), whose sum is σ = 242193600. Its totient is φ = 77264928.

The previous prime is 157977389. The next prime is 157977439. The reversal of 157977406 is 604779751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12636 + ... + 21808.

It is an arithmetic number, because the mean of its divisors is an integer number (15137100).

Almost surely, 2^157977406 is an apocalyptic number.

157977406 is a deficient number, since it is larger than the sum of its proper divisors (84216194).

157977406 is a wasteful number, since it uses less digits than its factorization.

157977406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9363.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 157977406 is about 12568.9063167803. The cubic root of 157977406 is about 540.5862471738.

The spelling of 157977406 in words is "one hundred fifty-seven million, nine hundred seventy-seven thousand, four hundred six".