397145160 has 256 divisors, whose sum is σ = 1422489600. Its totient is φ = 98205696.

The previous prime is 397145153. The next prime is 397145173. The reversal of 397145160 is 61541793.

It is a super-2 number, since 2×397145160² = 315448556222851200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1780809 + ... + 1781031.

It is an arithmetic number, because the mean of its divisors is an integer number (5556600).

Almost surely, 2^397145160 is an apocalyptic number.

397145160 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397145160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711244800).

397145160 is an abundant number, since it is smaller than the sum of its proper divisors (1025344440).

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

397145160 is a wasteful number, since it uses less digits than its factorization.

397145160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 397145160 is about 19928.5011980329. The cubic root of 397145160 is about 735.0492261907.

The spelling of 397145160 in words is "three hundred ninety-seven million, one hundred forty-five thousand, one hundred sixty".