397894290 has 16 divisors (see below), whose sum is σ = 954946368. Its totient is φ = 106105136.

The previous prime is 397894261. The next prime is 397894313. The reversal of 397894290 is 92498793.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6631542 + ... + 6631601.

It is an arithmetic number, because the mean of its divisors is an integer number (59684148).

Almost surely, 2^397894290 is an apocalyptic number.

397894290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397894290 is an abundant number, since it is smaller than the sum of its proper divisors (557052078).

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

397894290 is a wasteful number, since it uses less digits than its factorization.

397894290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13263153.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 397894290 is about 19947.2877855612. The cubic root of 397894290 is about 735.5111073181.

The spelling of 397894290 in words is "three hundred ninety-seven million, eight hundred ninety-four thousand, two hundred ninety".