399148232 has 64 divisors (see below), whose sum is σ = 872726400. Its totient is φ = 167616000.

The previous prime is 399148229. The next prime is 399148237. The reversal of 399148232 is 232841993.

It is a super-2 number, since 2×399148232² = 318638622217451648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399148232.

It is not an unprimeable number, because it can be changed into a prime (399148237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1025894 + ... + 1026282.

It is an arithmetic number, because the mean of its divisors is an integer number (13636350).

Almost surely, 2^399148232 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 399148232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436363200).

399148232 is an abundant number, since it is smaller than the sum of its proper divisors (473578168).

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

399148232 is a wasteful number, since it uses less digits than its factorization.

399148232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 722 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 399148232 is about 19978.6944518404. The cubic root of 399148232 is about 736.2829380429.

The spelling of 399148232 in words is "three hundred ninety-nine million, one hundred forty-eight thousand, two hundred thirty-two".