399319000 has 64 divisors (see below), whose sum is σ = 939612960. Its totient is φ = 158838400.

The previous prime is 399318989. The next prime is 399319033. The reversal of 399319000 is 913993.

It is a happy number.

It is a super-2 number, since 2×399319000² = 318911327522000000, 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 15 ways as a sum of consecutive naturals, for example, 195987 + ... + 198013.

Almost surely, 2^399319000 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 399319000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469806480).

399319000 is an abundant number, since it is smaller than the sum of its proper divisors (540293960).

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

399319000 is a wasteful number, since it uses less digits than its factorization.

399319000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245 (or 2231 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 399319000 is about 19982.9677475594. The cubic root of 399319000 is about 736.3879246352.

The spelling of 399319000 in words is "three hundred ninety-nine million, three hundred nineteen thousand".