399492464 has 20 divisors (see below), whose sum is σ = 884590704. Its totient is φ = 171211008.

The previous prime is 399492449. The next prime is 399492517. The reversal of 399492464 is 464294993.

It is a congruent number.

It is an unprimeable number.

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, 1783337 + ... + 1783560.

Almost surely, 2^399492464 is an apocalyptic number.

It is an amenable number.

399492464 is an abundant number, since it is smaller than the sum of its proper divisors (485098240).

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

399492464 is a wasteful number, since it uses less digits than its factorization.

399492464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566912 (or 3566906 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The square root of 399492464 is about 19987.3075725571. The cubic root of 399492464 is about 736.4945380639.

The spelling of 399492464 in words is "three hundred ninety-nine million, four hundred ninety-two thousand, four hundred sixty-four".