390445398 has 48 divisors (see below), whose sum is σ = 968647680. Its totient is φ = 111344688.

The previous prime is 390445387. The next prime is 390445399. The reversal of 390445398 is 893544093.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390445399) 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, 71323 + ... + 76601.

It is an arithmetic number, because the mean of its divisors is an integer number (20180160).

Almost surely, 2^390445398 is an apocalyptic number.

390445398 is an abundant number, since it is smaller than the sum of its proper divisors (578202282).

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

390445398 is a wasteful number, since it uses less digits than its factorization.

390445398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5881 (or 5878 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 390445398 is about 19759.6912425270. The cubic root of 390445398 is about 730.8923833659.

The spelling of 390445398 in words is "three hundred ninety million, four hundred forty-five thousand, three hundred ninety-eight".