397630250 has 16 divisors (see below), whose sum is σ = 744364296. Its totient is φ = 159052000.

The previous prime is 397630249. The next prime is 397630267. The reversal of 397630250 is 52036793.

It can be written as a sum of positive squares in 4 ways, for example, as 262861369 + 134768881 = 16213^2 + 11609^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 397630250.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795011 + ... + 795510.

Almost surely, 2^397630250 is an apocalyptic number.

397630250 is a deficient number, since it is larger than the sum of its proper divisors (346734046).

397630250 is a wasteful number, since it uses less digits than its factorization.

397630250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590538 (or 1590528 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 397630250 is about 19940.6682435670. The cubic root of 397630250 is about 735.3483778939.

The spelling of 397630250 in words is "three hundred ninety-seven million, six hundred thirty thousand, two hundred fifty".