16628879 has 4 divisors (see below), whose sum is σ = 16641576. Its totient is φ = 16616184.

The previous prime is 16628863. The next prime is 16628893. The reversal of 16628879 is 97882661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16628879 - 2⁴ = 16628863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16628809) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4124 + ... + 7089.

It is an arithmetic number, because the mean of its divisors is an integer number (4160394).

Almost surely, 2^16628879 is an apocalyptic number.

16628879 is a deficient number, since it is larger than the sum of its proper divisors (12697).

16628879 is a wasteful number, since it uses less digits than its factorization.

16628879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12696.

The product of its digits is 290304, while the sum is 47.

The square root of 16628879 is about 4077.8522533314. The cubic root of 16628879 is about 255.2432844153.

The spelling of 16628879 in words is "sixteen million, six hundred twenty-eight thousand, eight hundred seventy-nine".