390872936 has 8 divisors (see below), whose sum is σ = 732886770. Its totient is φ = 195436464.

The previous prime is 390872903. The next prime is 390872969. The reversal of 390872936 is 639278093.

It is an interprime number because it is at equal distance from previous prime (390872903) and next prime (390872969).

It can be written as a sum of positive squares in only one way, i.e., 201810436 + 189062500 = 14206^2 + 13750^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24429551 + ... + 24429566.

Almost surely, 2^390872936 is an apocalyptic number.

It is an amenable number.

390872936 is a deficient number, since it is larger than the sum of its proper divisors (342013834).

390872936 is a wasteful number, since it uses less digits than its factorization.

390872936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48859123 (or 48859119 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 390872936 is about 19770.5067208709. The cubic root of 390872936 is about 731.1590619522.

The spelling of 390872936 in words is "three hundred ninety million, eight hundred seventy-two thousand, nine hundred thirty-six".