399615356 has 24 divisors (see below), whose sum is σ = 818726496. Its totient is φ = 167086080.

The previous prime is 399615341. The next prime is 399615367. The reversal of 399615356 is 653516993.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399615356.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172901 + ... + 175196.

It is an arithmetic number, because the mean of its divisors is an integer number (34113604).

Almost surely, 2^399615356 is an apocalyptic number.

It is an amenable number.

399615356 is an abundant number, since it is smaller than the sum of its proper divisors (419111140).

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

399615356 is a wasteful number, since it uses less digits than its factorization.

399615356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348149 (or 348147 counting only the distinct ones).

The product of its digits is 656100, while the sum is 47.

The square root of 399615356 is about 19990.3815871534. The cubic root of 399615356 is about 736.5700505501.

The spelling of 399615356 in words is "three hundred ninety-nine million, six hundred fifteen thousand, three hundred fifty-six".