390456342 has 16 divisors (see below), whose sum is σ = 867680880. Its totient is φ = 130152096.

The previous prime is 390456281. The next prime is 390456347. The reversal of 390456342 is 243654093.

390456342 is a `hidden beast` number, since 3 + 90 + 4 + 563 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 390456297 and 390456306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390456347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3615283 + ... + 3615390.

It is an arithmetic number, because the mean of its divisors is an integer number (54230055).

Almost surely, 2^390456342 is an apocalyptic number.

390456342 is an abundant number, since it is smaller than the sum of its proper divisors (477224538).

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

390456342 is a wasteful number, since it uses less digits than its factorization.

390456342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230684 (or 7230678 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 390456342 is about 19759.9681679906. The cubic root of 390456342 is about 730.8992121581.

The spelling of 390456342 in words is "three hundred ninety million, four hundred fifty-six thousand, three hundred forty-two".