399818315 has 32 divisors (see below), whose sum is σ = 556609536. Its totient is φ = 273271680.

The previous prime is 399818249. The next prime is 399818323. The reversal of 399818315 is 513818993.

It is not a de Polignac number, because 399818315 - 2⁸ = 399818059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399818315.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42032 + ... + 50658.

It is an arithmetic number, because the mean of its divisors is an integer number (17394048).

Almost surely, 2^399818315 is an apocalyptic number.

399818315 is a deficient number, since it is larger than the sum of its proper divisors (156791221).

399818315 is a wasteful number, since it uses less digits than its factorization.

399818315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8699.

The product of its digits is 233280, while the sum is 47.

The square root of 399818315 is about 19995.4573591103. The cubic root of 399818315 is about 736.6947272900.

The spelling of 399818315 in words is "three hundred ninety-nine million, eight hundred eighteen thousand, three hundred fifteen".