399944017 has 16 divisors (see below), whose sum is σ = 456451200. Its totient is φ = 347079040.

The previous prime is 399944011. The next prime is 399944021. The reversal of 399944017 is 710449993.

It is a de Polignac number, because none of the positive numbers 2^k-399944017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399944011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21348 + ... + 35434.

It is an arithmetic number, because the mean of its divisors is an integer number (28528200).

Almost surely, 2^399944017 is an apocalyptic number.

It is an amenable number.

399944017 is a deficient number, since it is larger than the sum of its proper divisors (56507183).

399944017 is a wasteful number, since it uses less digits than its factorization.

399944017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14216.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 399944017 is about 19998.6003760263. The cubic root of 399944017 is about 736.7719242684.

The spelling of 399944017 in words is "three hundred ninety-nine million, nine hundred forty-four thousand, seventeen".