390423138 has 16 divisors (see below), whose sum is σ = 892395840. Its totient is φ = 111549456.

The previous prime is 390423109. The next prime is 390423151. The reversal of 390423138 is 831324093.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 390423099 and 390423108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4647853 + ... + 4647936.

It is an arithmetic number, because the mean of its divisors is an integer number (55774740).

Almost surely, 2^390423138 is an apocalyptic number.

390423138 is an abundant number, since it is smaller than the sum of its proper divisors (501972702).

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

390423138 is a wasteful number, since it uses less digits than its factorization.

390423138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9295801.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 390423138 is about 19759.1279665880. The cubic root of 390423138 is about 730.8784932687.

The spelling of 390423138 in words is "three hundred ninety million, four hundred twenty-three thousand, one hundred thirty-eight".