22353728 has 56 divisors (see below), whose sum is σ = 48280320. Its totient is φ = 10229760.

The previous prime is 22353713. The next prime is 22353731. The reversal of 22353728 is 82735322.

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

It is a junction number, because it is equal to n+sod(n) for n = 22353694 and 22353703.

It is a congruent number.

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, 37400 + ... + 37992.

Almost surely, 2^22353728 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 22353728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24140160).

22353728 is an abundant number, since it is smaller than the sum of its proper divisors (25926592).

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

22353728 is a wasteful number, since it uses less digits than its factorization.

22353728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 645 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 22353728 is about 4727.9729271645. The cubic root of 22353728 is about 281.6977127332.

The spelling of 22353728 in words is "twenty-two million, three hundred fifty-three thousand, seven hundred twenty-eight".