16564044 has 48 divisors (see below), whose sum is σ = 45602816. Its totient is φ = 4579200.

The previous prime is 16564043. The next prime is 16564063. The reversal of 16564044 is 44046561.

It is not an unprimeable number, because it can be changed into a prime (16564043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577 + ... + 5784.

Almost surely, 2^16564044 is an apocalyptic number.

16564044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16564044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22801408).

16564044 is an abundant number, since it is smaller than the sum of its proper divisors (29038772).

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

16564044 is a wasteful number, since it uses less digits than its factorization.

16564044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406 (or 6404 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 16564044 is about 4069.8948389363. The cubic root of 16564044 is about 254.9111262761.

The spelling of 16564044 in words is "sixteen million, five hundred sixty-four thousand, forty-four".