390939822 has 96 divisors (see below), whose sum is σ = 1076275200. Its totient is φ = 99766080.

The previous prime is 390939811. The next prime is 390939823. The reversal of 390939822 is 228939093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390939823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46929 + ... + 54627.

It is an arithmetic number, because the mean of its divisors is an integer number (11211200).

Almost surely, 2^390939822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390939822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538137600).

390939822 is an abundant number, since it is smaller than the sum of its proper divisors (685335378).

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

390939822 is a wasteful number, since it uses less digits than its factorization.

390939822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7758 (or 7755 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 390939822 is about 19772.1982085958. The cubic root of 390939822 is about 731.2007647762.

The spelling of 390939822 in words is "three hundred ninety million, nine hundred thirty-nine thousand, eight hundred twenty-two".