399604744 has 32 divisors (see below), whose sum is σ = 934142400. Its totient is φ = 155689920.

The previous prime is 399604729. The next prime is 399604747. The reversal of 399604744 is 447406993.

It is a junction number, because it is equal to n+sod(n) for n = 399604694 and 399604703.

It is not an unprimeable number, because it can be changed into a prime (399604747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323739 + ... + 324970.

It is an arithmetic number, because the mean of its divisors is an integer number (29191950).

Almost surely, 2^399604744 is an apocalyptic number.

It is an amenable number.

399604744 is an abundant number, since it is smaller than the sum of its proper divisors (534537656).

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

399604744 is a wasteful number, since it uses less digits than its factorization.

399604744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648733 (or 648729 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 399604744 is about 19990.1161577416. The cubic root of 399604744 is about 736.5635304882.

The spelling of 399604744 in words is "three hundred ninety-nine million, six hundred four thousand, seven hundred forty-four".