390779406 has 12 divisors (see below), whose sum is σ = 846688752. Its totient is φ = 130259796.

The previous prime is 390779371. The next prime is 390779413. The reversal of 390779406 is 604977093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10854966 + ... + 10855001.

It is an arithmetic number, because the mean of its divisors is an integer number (70557396).

Almost surely, 2^390779406 is an apocalyptic number.

390779406 is an abundant number, since it is smaller than the sum of its proper divisors (455909346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390779406 is a wasteful number, since it uses less digits than its factorization.

390779406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21709975 (or 21709972 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 390779406 is about 19768.1411872740. The cubic root of 390779406 is about 731.1007388536.

The spelling of 390779406 in words is "three hundred ninety million, seven hundred seventy-nine thousand, four hundred six".