397299490 has 32 divisors (see below), whose sum is σ = 822530304. Its totient is φ = 135345600.

The previous prime is 397299479. The next prime is 397299509. The reversal of 397299490 is 94992793.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7086 + ... + 29065.

It is an arithmetic number, because the mean of its divisors is an integer number (25704072).

Almost surely, 2^397299490 is an apocalyptic number.

397299490 is an abundant number, since it is smaller than the sum of its proper divisors (425230814).

397299490 is a wasteful number, since it uses less digits than its factorization.

397299490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36322.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The square root of 397299490 is about 19932.3729144324. The cubic root of 397299490 is about 735.1444268608.

The spelling of 397299490 in words is "three hundred ninety-seven million, two hundred ninety-nine thousand, four hundred ninety".