776991474 has 64 divisors (see below), whose sum is σ = 2059130880. Its totient is φ = 212343120.

The previous prime is 776991463. The next prime is 776991493. The reversal of 776991474 is 474199677.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 776991474.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35992 + ... + 53379.

It is an arithmetic number, because the mean of its divisors is an integer number (32173920).

Almost surely, 2^776991474 is an apocalyptic number.

776991474 is an abundant number, since it is smaller than the sum of its proper divisors (1282139406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

776991474 is a wasteful number, since it uses less digits than its factorization.

776991474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89412 (or 89406 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 776991474 is about 27874.5667948401. The cubic root of 776991474 is about 919.3313801331.

The spelling of 776991474 in words is "seven hundred seventy-six million, nine hundred ninety-one thousand, four hundred seventy-four".