397149156 has 30 divisors (see below), whose sum is σ = 1038227190. Its totient is φ = 132382944.

The previous prime is 397149149. The next prime is 397149209. The reversal of 397149156 is 651941793.

It can be written as a sum of positive squares in only one way, i.e., 383533056 + 13616100 = 19584^2 + 3690^2 .

It is a super-2 number, since 2×397149156² = 315454904223024672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 612561 + ... + 613208.

It is an arithmetic number, because the mean of its divisors is an integer number (34607573).

Almost surely, 2^397149156 is an apocalyptic number.

397149156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

397149156 is an abundant number, since it is smaller than the sum of its proper divisors (641078034).

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

397149156 is a wasteful number, since it uses less digits than its factorization.

397149156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225785 (or 1225774 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 397149156 is about 19928.6014561986. The cubic root of 397149156 is about 735.0516914916.

The spelling of 397149156 in words is "three hundred ninety-seven million, one hundred forty-nine thousand, one hundred fifty-six".