390873438 has 20 divisors (see below), whose sum is σ = 875846400. Its totient is φ = 130291092.

The previous prime is 390873437. The next prime is 390873449. The reversal of 390873438 is 834378093.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 390873393 and 390873402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390873433) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1206238 + ... + 1206561.

It is an arithmetic number, because the mean of its divisors is an integer number (43792320).

Almost surely, 2^390873438 is an apocalyptic number.

390873438 is an abundant number, since it is smaller than the sum of its proper divisors (484972962).

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

390873438 is a wasteful number, since it uses less digits than its factorization.

390873438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412813 (or 2412804 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 390873438 is about 19770.5194165454. The cubic root of 390873438 is about 731.1593749624.

The spelling of 390873438 in words is "three hundred ninety million, eight hundred seventy-three thousand, four hundred thirty-eight".