399532812 has 24 divisors (see below), whose sum is σ = 1065421056. Its totient is φ = 114152208.

The previous prime is 399532801. The next prime is 399532829. The reversal of 399532812 is 218235993.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2378088 + ... + 2378255.

It is an arithmetic number, because the mean of its divisors is an integer number (44392544).

Almost surely, 2^399532812 is an apocalyptic number.

It is an amenable number.

399532812 is an abundant number, since it is smaller than the sum of its proper divisors (665888244).

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

399532812 is a wasteful number, since it uses less digits than its factorization.

399532812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756357 (or 4756355 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 399532812 is about 19988.3168876221. The cubic root of 399532812 is about 736.5193320912.

The spelling of 399532812 in words is "three hundred ninety-nine million, five hundred thirty-two thousand, eight hundred twelve".