397656746 has 8 divisors (see below), whose sum is σ = 596571780. Its totient is φ = 198799488.

The previous prime is 397656703. The next prime is 397656751. The reversal of 397656746 is 647656793.

It can be written as a sum of positive squares in 2 ways, for example, as 397563721 + 93025 = 19939^2 + 305^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13850 + ... + 31418.

Almost surely, 2^397656746 is an apocalyptic number.

397656746 is a deficient number, since it is larger than the sum of its proper divisors (198915034).

397656746 is a wasteful number, since it uses less digits than its factorization.

397656746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28888.

The product of its digits is 5715360, while the sum is 53.

The square root of 397656746 is about 19941.3326034144. The cubic root of 397656746 is about 735.3647107876.

The spelling of 397656746 in words is "three hundred ninety-seven million, six hundred fifty-six thousand, seven hundred forty-six".