22728512 has 28 divisors (see below), whose sum is σ = 45537120. Its totient is φ = 11254656.

The previous prime is 22728493. The next prime is 22728521. The reversal of 22728512 is 21582722.

It is a congruent number.

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, 5189 + ... + 8507.

Almost surely, 2^22728512 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 22728512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22768560).

22728512 is an abundant number, since it is smaller than the sum of its proper divisors (22808608).

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

22728512 is a wasteful number, since it uses less digits than its factorization.

22728512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438 (or 3428 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 22728512 is about 4767.4429204763. The cubic root of 22728512 is about 283.2633158782.

The spelling of 22728512 in words is "twenty-two million, seven hundred twenty-eight thousand, five hundred twelve".