397478992 has 10 divisors (see below), whose sum is σ = 770115578. Its totient is φ = 198739488.

The previous prime is 397478981. The next prime is 397479011. The reversal of 397478992 is 299874793.

It can be written as a sum of positive squares in only one way, i.e., 395850816 + 1628176 = 19896^2 + 1276^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12421203 + ... + 12421234.

Almost surely, 2^397478992 is an apocalyptic number.

It is an amenable number.

397478992 is a deficient number, since it is larger than the sum of its proper divisors (372636586).

397478992 is a wasteful number, since it uses less digits than its factorization.

397478992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24842445 (or 24842439 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The square root of 397478992 is about 19936.8751814320. The cubic root of 397478992 is about 735.2551242313.

The spelling of 397478992 in words is "three hundred ninety-seven million, four hundred seventy-eight thousand, nine hundred ninety-two".