390243976 has 16 divisors (see below), whose sum is σ = 774749340. Its totient is φ = 183644160.

The previous prime is 390243943. The next prime is 390243989. The reversal of 390243976 is 679342093.

It can be written as a sum of positive squares in 2 ways, for example, as 390062500 + 181476 = 19750^2 + 426^2 .

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, 1434585 + ... + 1434856.

Almost surely, 2^390243976 is an apocalyptic number.

It is an amenable number.

390243976 is a deficient number, since it is larger than the sum of its proper divisors (384505364).

390243976 is a wasteful number, since it uses less digits than its factorization.

390243976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869464 (or 2869460 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 390243976 is about 19754.5937948620. The cubic root of 390243976 is about 730.7666780995.

The spelling of 390243976 in words is "three hundred ninety million, two hundred forty-three thousand, nine hundred seventy-six".