399943344 has 40 divisors (see below), whose sum is σ = 1057220032. Its totient is φ = 130213440.

The previous prime is 399943339. The next prime is 399943361. The reversal of 399943344 is 443349993.

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 = 399943293 and 399943302.

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, 94822 + ... + 98949.

Almost surely, 2^399943344 is an apocalyptic number.

It is an amenable number.

399943344 is an abundant number, since it is smaller than the sum of its proper divisors (657276688).

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

399943344 is a wasteful number, since it uses less digits than its factorization.

399943344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193825 (or 193819 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 48.

The square root of 399943344 is about 19998.5835498417. The cubic root of 399943344 is about 736.7715110041.

The spelling of 399943344 in words is "three hundred ninety-nine million, nine hundred forty-three thousand, three hundred forty-four".