399994844 has 12 divisors (see below), whose sum is σ = 701274504. Its totient is φ = 199630704.

The previous prime is 399994831. The next prime is 399994849. The reversal of 399994844 is 448499993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399994849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89219 + ... + 93594.

It is an arithmetic number, because the mean of its divisors is an integer number (58439542).

Almost surely, 2^399994844 is an apocalyptic number.

It is an amenable number.

399994844 is a deficient number, since it is larger than the sum of its proper divisors (301279660).

399994844 is a wasteful number, since it uses less digits than its factorization.

399994844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183364 (or 183362 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 59.

The square root of 399994844 is about 19999.8710995846. The cubic root of 399994844 is about 736.8031339034.

The spelling of 399994844 in words is "three hundred ninety-nine million, nine hundred ninety-four thousand, eight hundred forty-four".