399932472 has 16 divisors (see below), whose sum is σ = 999831240. Its totient is φ = 133310816.

The previous prime is 399932453. The next prime is 399932473. The reversal of 399932472 is 274239993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399932473) 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 3 ways as a sum of consecutive naturals, for example, 8331903 + ... + 8331950.

Almost surely, 2^399932472 is an apocalyptic number.

It is an amenable number.

399932472 is an abundant number, since it is smaller than the sum of its proper divisors (599898768).

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

399932472 is a wasteful number, since it uses less digits than its factorization.

399932472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16663862 (or 16663858 counting only the distinct ones).

The product of its digits is 734832, while the sum is 48.

The square root of 399932472 is about 19998.3117287435. The cubic root of 399932472 is about 736.7648348481.

The spelling of 399932472 in words is "three hundred ninety-nine million, nine hundred thirty-two thousand, four hundred seventy-two".