77238944 has 24 divisors (see below), whose sum is σ = 152263188. Its totient is φ = 38568960.

The previous prime is 77238923. The next prime is 77238961. The reversal of 77238944 is 44983277.

It can be written as a sum of positive squares in 2 ways, for example, as 77228944 + 10000 = 8788^2 + 100^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77238895 and 77238904.

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, 40574 + ... + 42434.

Almost surely, 2^77238944 is an apocalyptic number.

It is an amenable number.

77238944 is a deficient number, since it is larger than the sum of its proper divisors (75024244).

77238944 is a wasteful number, since it uses less digits than its factorization.

77238944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168 (or 3160 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 77238944 is about 8788.5689392529. The cubic root of 77238944 is about 425.8716946287.

Adding to 77238944 its reverse (44983277), we get a palindrome (122222221).

The spelling of 77238944 in words is "seventy-seven million, two hundred thirty-eight thousand, nine hundred forty-four".