399315224 has 32 divisors (see below), whose sum is σ = 933465600. Its totient is φ = 155577120.

The previous prime is 399315223. The next prime is 399315233. The reversal of 399315224 is 422513993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399315221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323504 + ... + 324735.

It is an arithmetic number, because the mean of its divisors is an integer number (29170800).

Almost surely, 2^399315224 is an apocalyptic number.

It is an amenable number.

399315224 is an abundant number, since it is smaller than the sum of its proper divisors (534150376).

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

399315224 is a wasteful number, since it uses less digits than its factorization.

399315224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648263 (or 648259 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 399315224 is about 19982.8732668753. The cubic root of 399315224 is about 736.3856035089.

The spelling of 399315224 in words is "three hundred ninety-nine million, three hundred fifteen thousand, two hundred twenty-four".