22648728 has 32 divisors (see below), whose sum is σ = 58005360. Its totient is φ = 7365120.

The previous prime is 22648727. The next prime is 22648733. The reversal of 22648728 is 82784622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22648727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10525 + ... + 12492.

Almost surely, 2^22648728 is an apocalyptic number.

It is an amenable number.

22648728 is an abundant number, since it is smaller than the sum of its proper divisors (35356632).

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

22648728 is a wasteful number, since it uses less digits than its factorization.

22648728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23067 (or 23063 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 22648728 is about 4759.0679759802. The cubic root of 22648728 is about 282.9314804544.

The spelling of 22648728 in words is "twenty-two million, six hundred forty-eight thousand, seven hundred twenty-eight".