16398915 has 24 divisors (see below), whose sum is σ = 28416240. Its totient is φ = 8072064.

The previous prime is 16398887. The next prime is 16398947. The reversal of 16398915 is 51989361.

It is not a de Polignac number, because 16398915 - 2²² = 12204611 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 700 + ... + 5769.

It is an arithmetic number, because the mean of its divisors is an integer number (1184010).

Almost surely, 2^16398915 is an apocalyptic number.

16398915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16398915 is a deficient number, since it is larger than the sum of its proper divisors (12017325).

16398915 is a wasteful number, since it uses less digits than its factorization.

16398915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6503 (or 6490 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 16398915 is about 4049.5573832210. The cubic root of 16398915 is about 254.0612155346.

The spelling of 16398915 in words is "sixteen million, three hundred ninety-eight thousand, nine hundred fifteen".