791639808 has 144 divisors (see below), whose sum is σ = 2230674432. Its totient is φ = 248832000.

The previous prime is 791639789. The next prime is 791639809. The reversal of 791639808 is 808936197.

It is a super-2 number, since 2×791639808² = 1253387171220553728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791639809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975723 + ... + 976533.

Almost surely, 2^791639808 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 791639808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1115337216).

791639808 is an abundant number, since it is smaller than the sum of its proper divisors (1439034624).

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

791639808 is a wasteful number, since it uses less digits than its factorization.

791639808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 791639808 is about 28136.0943984768. The cubic root of 791639808 is about 925.0727220157.

The spelling of 791639808 in words is "seven hundred ninety-one million, six hundred thirty-nine thousand, eight hundred eight".