396931970 has 8 divisors (see below), whose sum is σ = 714477564. Its totient is φ = 158772784.

The previous prime is 396931957. The next prime is 396931981. The reversal of 396931970 is 79139693.

It can be written as a sum of positive squares in 2 ways, for example, as 391367089 + 5564881 = 19783^2 + 2359^2 .

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, 19846589 + ... + 19846608.

Almost surely, 2^396931970 is an apocalyptic number.

396931970 is a deficient number, since it is larger than the sum of its proper divisors (317545594).

396931970 is a wasteful number, since it uses less digits than its factorization.

396931970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39693204.

The product of its (nonzero) digits is 275562, while the sum is 47.

The square root of 396931970 is about 19923.1516081166. The cubic root of 396931970 is about 734.9176763119.

The spelling of 396931970 in words is "three hundred ninety-six million, nine hundred thirty-one thousand, nine hundred seventy".