16628872 has 32 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 7608384.

The previous prime is 16628863. The next prime is 16628893. The reversal of 16628872 is 27882661.

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, 12579 + ... + 13837.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^16628872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16628872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16934400).

16628872 is an abundant number, since it is smaller than the sum of its proper divisors (17239928).

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

16628872 is a wasteful number, since it uses less digits than its factorization.

16628872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405 (or 1401 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 16628872 is about 4077.8513950364. The cubic root of 16628872 is about 255.2432486000.

The spelling of 16628872 in words is "sixteen million, six hundred twenty-eight thousand, eight hundred seventy-two".