779990940 has 72 divisors (see below), whose sum is σ = 2505157200. Its totient is φ = 195761664.

The previous prime is 779990933. The next prime is 779990951. The reversal of 779990940 is 49099977.

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, 124390 + ... + 130509.

It is an arithmetic number, because the mean of its divisors is an integer number (34793850).

Almost surely, 2^779990940 is an apocalyptic number.

It is an amenable number.

779990940 is an abundant number, since it is smaller than the sum of its proper divisors (1725166260).

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

779990940 is a wasteful number, since it uses less digits than its factorization.

779990940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254931 (or 254926 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 779990940 is about 27928.3178870479. The cubic root of 779990940 is about 920.5128441871.

The spelling of 779990940 in words is "seven hundred seventy-nine million, nine hundred ninety thousand, nine hundred forty".