399822894 has 24 divisors (see below), whose sum is σ = 866970000. Its totient is φ = 133168608.

The previous prime is 399822877. The next prime is 399822911. The reversal of 399822894 is 498228993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (399822877) and next prime (399822911).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 399822894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16482 + ... + 32730.

It is an arithmetic number, because the mean of its divisors is an integer number (36123750).

Almost surely, 2^399822894 is an apocalyptic number.

399822894 is an abundant number, since it is smaller than the sum of its proper divisors (467147106).

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

399822894 is a wasteful number, since it uses less digits than its factorization.

399822894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17624 (or 17621 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 399822894 is about 19995.5718597894. The cubic root of 399822894 is about 736.6975396610.

The spelling of 399822894 in words is "three hundred ninety-nine million, eight hundred twenty-two thousand, eight hundred ninety-four".