399824544 has 48 divisors (see below), whose sum is σ = 1199475648. Its totient is φ = 114235392.

The previous prime is 399824539. The next prime is 399824563. The reversal of 399824544 is 445428993.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 399824493 and 399824502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296817 + ... + 298160.

It is an arithmetic number, because the mean of its divisors is an integer number (24989076).

Almost surely, 2^399824544 is an apocalyptic number.

It is an amenable number.

399824544 is an abundant number, since it is smaller than the sum of its proper divisors (799651104).

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

399824544 is a wasteful number, since it uses less digits than its factorization.

399824544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594997 (or 594989 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 399824544 is about 19995.6131188819. The cubic root of 399824544 is about 736.6985530674.

The spelling of 399824544 in words is "three hundred ninety-nine million, eight hundred twenty-four thousand, five hundred forty-four".