16399115 has 8 divisors (see below), whose sum is σ = 20534688. Its totient is φ = 12548800.

The previous prime is 16399091. The next prime is 16399133. The reversal of 16399115 is 51199361.

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

It is not a de Polignac number, because 16399115 - 2⁸ = 16398859 is a prime.

It is a Duffinian number.

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, 71186 + ... + 71415.

It is an arithmetic number, because the mean of its divisors is an integer number (2566836).

Almost surely, 2^16399115 is an apocalyptic number.

16399115 is a deficient number, since it is larger than the sum of its proper divisors (4135573).

16399115 is a wasteful number, since it uses less digits than its factorization.

16399115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142629.

The product of its digits is 7290, while the sum is 35.

The square root of 16399115 is about 4049.5820772025. The cubic root of 16399115 is about 254.0622483679.

The spelling of 16399115 in words is "sixteen million, three hundred ninety-nine thousand, one hundred fifteen".