779796638 has 8 divisors (see below), whose sum is σ = 1172222688. Its totient is φ = 389055744.

The previous prime is 779796629. The next prime is 779796643. The reversal of 779796638 is 836697977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×779796638² = 1216165593272206088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420131 + ... + 421982.

It is an arithmetic number, because the mean of its divisors is an integer number (146527836).

Almost surely, 2^779796638 is an apocalyptic number.

779796638 is a deficient number, since it is larger than the sum of its proper divisors (392426050).

779796638 is a wasteful number, since it uses less digits than its factorization.

779796638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842578.

The product of its digits is 24004512, while the sum is 62.

The square root of 779796638 is about 27924.8390863761. The cubic root of 779796638 is about 920.4364021281.

The spelling of 779796638 in words is "seven hundred seventy-nine million, seven hundred ninety-six thousand, six hundred thirty-eight".