399505115 has 8 divisors (see below), whose sum is σ = 504638160. Its totient is φ = 302782752.

The previous prime is 399505097. The next prime is 399505163. The reversal of 399505115 is 511505993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399505115 - 2¹² = 399501019 is a prime.

It is a super-2 number, since 2×399505115² = 319208673822326450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2102564 + ... + 2102753.

It is an arithmetic number, because the mean of its divisors is an integer number (63079770).

Almost surely, 2^399505115 is an apocalyptic number.

399505115 is a deficient number, since it is larger than the sum of its proper divisors (105133045).

399505115 is a wasteful number, since it uses less digits than its factorization.

399505115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205341.

The product of its (nonzero) digits is 30375, while the sum is 38.

The square root of 399505115 is about 19987.6240458940. The cubic root of 399505115 is about 736.5023123399.

The spelling of 399505115 in words is "three hundred ninety-nine million, five hundred five thousand, one hundred fifteen".