390020872 has 8 divisors (see below), whose sum is σ = 731289150. Its totient is φ = 195010432.

The previous prime is 390020863. The next prime is 390020903. The reversal of 390020872 is 278020093.

It can be written as a sum of positive squares in only one way, i.e., 364275396 + 25745476 = 19086^2 + 5074^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24376297 + ... + 24376312.

Almost surely, 2^390020872 is an apocalyptic number.

It is an amenable number.

390020872 is a deficient number, since it is larger than the sum of its proper divisors (341268278).

390020872 is a wasteful number, since it uses less digits than its factorization.

390020872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48752615 (or 48752611 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 390020872 is about 19748.9460984631. The cubic root of 390020872 is about 730.6273908343.

The spelling of 390020872 in words is "three hundred ninety million, twenty thousand, eight hundred seventy-two".