393422008 has 64 divisors (see below), whose sum is σ = 859032000. Its totient is φ = 165445632.

The previous prime is 393421979. The next prime is 393422017. The reversal of 393422008 is 800224393.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961708 + ... + 962116.

It is an arithmetic number, because the mean of its divisors is an integer number (13422375).

Almost surely, 2^393422008 is an apocalyptic number.

393422008 is the 11452-nd octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 393422008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429516000).

393422008 is an abundant number, since it is smaller than the sum of its proper divisors (465609992).

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

393422008 is a wasteful number, since it uses less digits than its factorization.

393422008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 393422008 is about 19834.8684896069. The cubic root of 393422008 is about 732.7450335941.

The spelling of 393422008 in words is "three hundred ninety-three million, four hundred twenty-two thousand, eight".