779379840 has 512 divisors, whose sum is σ = 3013977600. Its totient is φ = 189775872.

The previous prime is 779379833. The next prime is 779379857. The reversal of 779379840 is 48973977.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14705254 + ... + 14705306.

It is an arithmetic number, because the mean of its divisors is an integer number (5886675).

Almost surely, 2^779379840 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 779379840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506988800).

779379840 is an abundant number, since it is smaller than the sum of its proper divisors (2234597760).

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

779379840 is a wasteful number, since it uses less digits than its factorization.

779379840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 123 counting only the distinct ones).

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

The square root of 779379840 is about 27917.3752347888. The cubic root of 779379840 is about 920.2723831161.

The spelling of 779379840 in words is "seven hundred seventy-nine million, three hundred seventy-nine thousand, eight hundred forty".