77931044 has 12 divisors (see below), whose sum is σ = 136966284. Its totient is φ = 38797824.

The previous prime is 77931031. The next prime is 77931047. The reversal of 77931044 is 44013977.

It can be written as a sum of positive squares in 2 ways, for example, as 36457444 + 41473600 = 6038^2 + 6440^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77930995 and 77931013.

It is not an unprimeable number, because it can be changed into a prime (77931047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40877 + ... + 42740.

It is an arithmetic number, because the mean of its divisors is an integer number (11413857).

Almost surely, 2^77931044 is an apocalyptic number.

It is an amenable number.

77931044 is a deficient number, since it is larger than the sum of its proper divisors (59035240).

77931044 is a wasteful number, since it uses less digits than its factorization.

77931044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83854 (or 83852 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 77931044 is about 8827.8561383838. The cubic root of 77931044 is about 427.1399227356.

The spelling of 77931044 in words is "seventy-seven million, nine hundred thirty-one thousand, forty-four".