397656274 has 4 divisors (see below), whose sum is σ = 596484414. Its totient is φ = 198828136.

The previous prime is 397656271. The next prime is 397656289. The reversal of 397656274 is 472656793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 394618225 + 3038049 = 19865^2 + 1743^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (397656271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99414067 + ... + 99414070.

Almost surely, 2^397656274 is an apocalyptic number.

397656274 is a deficient number, since it is larger than the sum of its proper divisors (198828140).

397656274 is a wasteful number, since it uses less digits than its factorization.

397656274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198828139.

The product of its digits is 1905120, while the sum is 49.

The square root of 397656274 is about 19941.3207686953. The cubic root of 397656274 is about 735.3644198396.

The spelling of 397656274 in words is "three hundred ninety-seven million, six hundred fifty-six thousand, two hundred seventy-four".