397893236 has 12 divisors (see below), whose sum is σ = 749875812. Its totient is φ = 183643008.

The previous prime is 397893229. The next prime is 397893241. The reversal of 397893236 is 632398793.

It can be written as a sum of positive squares in 2 ways, for example, as 153908836 + 243984400 = 12406^2 + 15620^2 .

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, 3825845 + ... + 3825948.

It is an arithmetic number, because the mean of its divisors is an integer number (62489651).

Almost surely, 2^397893236 is an apocalyptic number.

It is an amenable number.

397893236 is a deficient number, since it is larger than the sum of its proper divisors (351982576).

397893236 is a wasteful number, since it uses less digits than its factorization.

397893236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651810 (or 7651808 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 50.

The square root of 397893236 is about 19947.2613659119. The cubic root of 397893236 is about 735.5104578748.

The spelling of 397893236 in words is "three hundred ninety-seven million, eight hundred ninety-three thousand, two hundred thirty-six".