16228864 has 40 divisors (see below), whose sum is σ = 33574860. Its totient is φ = 7827456.

The previous prime is 16228853. The next prime is 16228879. The reversal of 16228864 is 46882261.

It can be written as a sum of positive squares in 2 ways, for example, as 14379264 + 1849600 = 3792^2 + 1360^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14302 + ... + 15394.

Almost surely, 2^16228864 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 16228864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16787430).

16228864 is an abundant number, since it is smaller than the sum of its proper divisors (17345996).

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

16228864 is an equidigital number, since it uses as much as digits as its factorization.

16228864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1124 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 16228864 is about 4028.5064229811. The cubic root of 16228864 is about 253.1799872209.

The spelling of 16228864 in words is "sixteen million, two hundred twenty-eight thousand, eight hundred sixty-four".