390447492 has 72 divisors (see below), whose sum is σ = 968569056. Its totient is φ = 122397696.

The previous prime is 390447479. The next prime is 390447493. The reversal of 390447492 is 294744093.

It is not an unprimeable number, because it can be changed into a prime (390447493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 835843 + ... + 836309.

It is an arithmetic number, because the mean of its divisors is an integer number (13452348).

Almost surely, 2^390447492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390447492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (484284528).

390447492 is an abundant number, since it is smaller than the sum of its proper divisors (578121564).

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

390447492 is a wasteful number, since it uses less digits than its factorization.

390447492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 390447492 is about 19759.7442291139. The cubic root of 390447492 is about 730.8936899813.

The spelling of 390447492 in words is "three hundred ninety million, four hundred forty-seven thousand, four hundred ninety-two".