156977944 has 32 divisors (see below), whose sum is σ = 312945120. Its totient is φ = 73655296.

The previous prime is 156977941. The next prime is 156977963. The reversal of 156977944 is 449779651.

It is a junction number, because it is equal to n+sod(n) for n = 156977891 and 156977900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156977941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1704 + ... + 17800.

It is an arithmetic number, because the mean of its divisors is an integer number (9779535).

Almost surely, 2^156977944 is an apocalyptic number.

It is an amenable number.

156977944 is a deficient number, since it is larger than the sum of its proper divisors (155967176).

156977944 is a wasteful number, since it uses less digits than its factorization.

156977944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16179 (or 16175 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The square root of 156977944 is about 12529.0839250122. The cubic root of 156977944 is about 539.4438077565.

The spelling of 156977944 in words is "one hundred fifty-six million, nine hundred seventy-seven thousand, nine hundred forty-four".