397901384 has 16 divisors (see below), whose sum is σ = 750380220. Its totient is φ = 197800000.

The previous prime is 397901377. The next prime is 397901393. The reversal of 397901384 is 483109793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 396408100 + 1493284 = 19910^2 + 1222^2 .

It is a super-2 number, since 2×397901384² = 316651022778230912, which contains 22 as substring.

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, 142367 + ... + 145134.

Almost surely, 2^397901384 is an apocalyptic number.

It is an amenable number.

397901384 is a deficient number, since it is larger than the sum of its proper divisors (352478836).

397901384 is a wasteful number, since it uses less digits than its factorization.

397901384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287680 (or 287676 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 397901384 is about 19947.4656034294. The cubic root of 397901384 is about 735.5154783994.

The spelling of 397901384 in words is "three hundred ninety-seven million, nine hundred one thousand, three hundred eighty-four".