397011506 has 16 divisors (see below), whose sum is σ = 631730016. Its totient is φ = 186478656.

The previous prime is 397011497. The next prime is 397011509. The reversal of 397011506 is 605110793.

It is not an unprimeable number, because it can be changed into a prime (397011509) 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, 7925 + ... + 29271.

It is an arithmetic number, because the mean of its divisors is an integer number (39483126).

Almost surely, 2^397011506 is an apocalyptic number.

397011506 is a deficient number, since it is larger than the sum of its proper divisors (234718510).

397011506 is a wasteful number, since it uses less digits than its factorization.

397011506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21913.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 397011506 is about 19925.1475778725. The cubic root of 397011506 is about 734.9667598770.

The spelling of 397011506 in words is "three hundred ninety-seven million, eleven thousand, five hundred six".