397138210 has 64 divisors (see below), whose sum is σ = 848517120. Its totient is φ = 130959360.

The previous prime is 397138187. The next prime is 397138213. The reversal of 397138210 is 12831793.

It is not an unprimeable number, because it can be changed into a prime (397138213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427026 + ... + 427954.

It is an arithmetic number, because the mean of its divisors is an integer number (13258080).

Almost surely, 2^397138210 is an apocalyptic number.

397138210 is an abundant number, since it is smaller than the sum of its proper divisors (451378910).

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

397138210 is a wasteful number, since it uses less digits than its factorization.

397138210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 397138210 is about 19928.3268238957. The cubic root of 397138210 is about 735.0449384034.

The spelling of 397138210 in words is "three hundred ninety-seven million, one hundred thirty-eight thousand, two hundred ten".