399395832 has 64 divisors (see below), whose sum is σ = 1098351360. Its totient is φ = 121019360.

The previous prime is 399395819. The next prime is 399395833. The reversal of 399395832 is 238593993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399395833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25693 + ... + 38195.

It is an arithmetic number, because the mean of its divisors is an integer number (17161740).

Almost surely, 2^399395832 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 399395832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549175680).

399395832 is an abundant number, since it is smaller than the sum of its proper divisors (698955528).

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

399395832 is a wasteful number, since it uses less digits than its factorization.

399395832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12545 (or 12519 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 51.

The square root of 399395832 is about 19984.8900922672. The cubic root of 399395832 is about 736.4351504778.

It can be divided in two parts, 3993 and 95832, that multiplied together give a cube (382657176 = 726³).

The spelling of 399395832 in words is "three hundred ninety-nine million, three hundred ninety-five thousand, eight hundred thirty-two".