399452191432 has 64 divisors (see below), whose sum is σ = 894575969280. Its totient is φ = 163495582272.

The previous prime is 399452191423. The next prime is 399452191433. The reversal of 399452191432 is 234191254993.

It is a super-3 number, since 3×399452191432³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399452191432.

It is not an unprimeable number, because it can be changed into a prime (399452191433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 587023 + ... + 1069345.

It is an arithmetic number, because the mean of its divisors is an integer number (13977749520).

Almost surely, 2^399452191432 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 399452191432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447287984640).

399452191432 is an abundant number, since it is smaller than the sum of its proper divisors (495123777848).

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

399452191432 is a wasteful number, since it uses less digits than its factorization.

399452191432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483002 (or 482998 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 52.

The spelling of 399452191432 in words is "three hundred ninety-nine billion, four hundred fifty-two million, one hundred ninety-one thousand, four hundred thirty-two".