397491366 has 16 divisors (see below), whose sum is σ = 795207600. Its totient is φ = 132459648.

The previous prime is 397491349. The next prime is 397491379. The reversal of 397491366 is 663194793.

It is a congruent number.

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, 21370 + ... + 35378.

It is an arithmetic number, because the mean of its divisors is an integer number (49700475).

Almost surely, 2^397491366 is an apocalyptic number.

397491366 is an abundant number, since it is smaller than the sum of its proper divisors (397716234).

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

397491366 is a wasteful number, since it uses less digits than its factorization.

397491366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18743.

The product of its digits is 734832, while the sum is 48.

The square root of 397491366 is about 19937.1855084914. The cubic root of 397491366 is about 735.2627539448.

The spelling of 397491366 in words is "three hundred ninety-seven million, four hundred ninety-one thousand, three hundred sixty-six".