397793390 has 16 divisors (see below), whose sum is σ = 716927760. Its totient is φ = 158917440.

The previous prime is 397793339. The next prime is 397793393. The reversal of 397793390 is 93397793.

It is a happy number.

It is a super-2 number, since 2×397793390² = 316479162255384200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397793393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16496 + ... + 32675.

It is an arithmetic number, because the mean of its divisors is an integer number (44807985).

Almost surely, 2^397793390 is an apocalyptic number.

397793390 is a deficient number, since it is larger than the sum of its proper divisors (319134370).

397793390 is a wasteful number, since it uses less digits than its factorization.

397793390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49987.

The product of its (nonzero) digits is 964467, while the sum is 50.

The square root of 397793390 is about 19944.7584593045. The cubic root of 397793390 is about 735.4489305486.

The spelling of 397793390 in words is "three hundred ninety-seven million, seven hundred ninety-three thousand, three hundred ninety".