776861904 has 120 divisors (see below), whose sum is σ = 2483775552. Its totient is φ = 204871680.

The previous prime is 776861887. The next prime is 776861927. The reversal of 776861904 is 409168677.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49944 + ... + 63624.

Almost surely, 2^776861904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776861904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241887776).

776861904 is an abundant number, since it is smaller than the sum of its proper divisors (1706913648).

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

776861904 is a wasteful number, since it uses less digits than its factorization.

776861904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13725 (or 13706 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 776861904 is about 27872.2425362582. The cubic root of 776861904 is about 919.2802751584.

The spelling of 776861904 in words is "seven hundred seventy-six million, eight hundred sixty-one thousand, nine hundred four".