397264870 has 8 divisors (see below), whose sum is σ = 715076784. Its totient is φ = 158905944.

The previous prime is 397264859. The next prime is 397264897. The reversal of 397264870 is 78462793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×397264870² = 315638753872233800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397264870.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19863234 + ... + 19863253.

It is an arithmetic number, because the mean of its divisors is an integer number (89384598).

Almost surely, 2^397264870 is an apocalyptic number.

397264870 is a deficient number, since it is larger than the sum of its proper divisors (317811914).

397264870 is a wasteful number, since it uses less digits than its factorization.

397264870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39726494.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 397264870 is about 19931.5044590217. The cubic root of 397264870 is about 735.1230731633.

The spelling of 397264870 in words is "three hundred ninety-seven million, two hundred sixty-four thousand, eight hundred seventy".