797638590 has 80 divisors (see below), whose sum is σ = 2451173472. Its totient is φ = 182316096.

The previous prime is 797638579. The next prime is 797638603. The reversal of 797638590 is 95836797.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 64669 + ... + 76008.

Almost surely, 2^797638590 is an apocalyptic number.

797638590 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

797638590 is an abundant number, since it is smaller than the sum of its proper divisors (1653534882).

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

797638590 is a wasteful number, since it uses less digits than its factorization.

797638590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140703 (or 140694 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 797638590 is about 28242.4961715497. The cubic root of 797638590 is about 927.4034753506.

The spelling of 797638590 in words is "seven hundred ninety-seven million, six hundred thirty-eight thousand, five hundred ninety".