77800928 has 12 divisors (see below), whose sum is σ = 153170640. Its totient is φ = 38900448.

The previous prime is 77800907. The next prime is 77800937. The reversal of 77800928 is 82900877.

It is a super-2 number, since 2×77800928² = 12105968795322368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215608 + ... + 1215671.

It is an arithmetic number, because the mean of its divisors is an integer number (12764220).

Almost surely, 2^77800928 is an apocalyptic number.

It is an amenable number.

77800928 is a deficient number, since it is larger than the sum of its proper divisors (75369712).

77800928 is a wasteful number, since it uses less digits than its factorization.

77800928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431289 (or 2431281 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 77800928 is about 8820.4834334633. The cubic root of 77800928 is about 426.9020684502.

The spelling of 77800928 in words is "seventy-seven million, eight hundred thousand, nine hundred twenty-eight".