22728704 has 52 divisors (see below), whose sum is σ = 47180160. Its totient is φ = 10936320.

The previous prime is 22728703. The next prime is 22728757. The reversal of 22728704 is 40782722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22728703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126887 + ... + 127065.

Almost surely, 2^22728704 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 22728704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23590080).

22728704 is an abundant number, since it is smaller than the sum of its proper divisors (24451456).

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

22728704 is an equidigital number, since it uses as much as digits as its factorization.

22728704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 22728704 is about 4767.4630570147. The cubic root of 22728704 is about 283.2641135020.

It can be divided in two parts, 22728 and 704, that added together give a palindrome (23432).

The spelling of 22728704 in words is "twenty-two million, seven hundred twenty-eight thousand, seven hundred four".