390486838 has 16 divisors (see below), whose sum is σ = 708783264. Its totient is φ = 157507200.

The previous prime is 390486799. The next prime is 390486919. The reversal of 390486838 is 838684093.

It is a junction number, because it is equal to n+sod(n) for n = 390486791 and 390486800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820113 + ... + 820588.

It is an arithmetic number, because the mean of its divisors is an integer number (44298954).

Almost surely, 2^390486838 is an apocalyptic number.

390486838 is a deficient number, since it is larger than the sum of its proper divisors (318296426).

390486838 is a wasteful number, since it uses less digits than its factorization.

390486838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640727.

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 390486838 is about 19760.7398140859. The cubic root of 390486838 is about 730.9182402540.

The spelling of 390486838 in words is "three hundred ninety million, four hundred eighty-six thousand, eight hundred thirty-eight".