399341888 has 56 divisors (see below), whose sum is σ = 887906784. Its totient is φ = 176601600.

The previous prime is 399341863. The next prime is 399341941. The reversal of 399341888 is 888143993.

It is a super-2 number, since 2×399341888² = 318947887022809088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18383 + ... + 33713.

Almost surely, 2^399341888 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 399341888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443953392).

399341888 is an abundant number, since it is smaller than the sum of its proper divisors (488564896).

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

399341888 is a wasteful number, since it uses less digits than its factorization.

399341888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15391 (or 15381 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 53.

The square root of 399341888 is about 19983.5404270615. The cubic root of 399341888 is about 736.4019936918.

The spelling of 399341888 in words is "three hundred ninety-nine million, three hundred forty-one thousand, eight hundred eighty-eight".