397257190 has 32 divisors (see below), whose sum is σ = 825958944. Its totient is φ = 135959040.

The previous prime is 397257169. The next prime is 397257191. The reversal of 397257190 is 91752793.

It is a super-2 number, since 2×397257190² = 315626550013392200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397257191) 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, 104349 + ... + 108088.

It is an arithmetic number, because the mean of its divisors is an integer number (25811217).

Almost surely, 2^397257190 is an apocalyptic number.

397257190 is an abundant number, since it is smaller than the sum of its proper divisors (428701754).

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

397257190 is a wasteful number, since it uses less digits than its factorization.

397257190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212472.

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 397257190 is about 19931.3117982736. The cubic root of 397257190 is about 735.1183359531.

The spelling of 397257190 in words is "three hundred ninety-seven million, two hundred fifty-seven thousand, one hundred ninety".