399057417 has 24 divisors (see below), whose sum is σ = 637685568. Its totient is φ = 238442400.

The previous prime is 399057413. The next prime is 399057431. The reversal of 399057417 is 714750993.

It is not a de Polignac number, because 399057417 - 2² = 399057413 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399057413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21358 + ... + 35415.

It is an arithmetic number, because the mean of its divisors is an integer number (26570232).

Almost surely, 2^399057417 is an apocalyptic number.

It is an amenable number.

399057417 is a deficient number, since it is larger than the sum of its proper divisors (238628151).

399057417 is a wasteful number, since it uses less digits than its factorization.

399057417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56861 (or 56858 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 399057417 is about 19976.4215263896. The cubic root of 399057417 is about 736.2270936210.

The spelling of 399057417 in words is "three hundred ninety-nine million, fifty-seven thousand, four hundred seventeen".