22487728 has 20 divisors (see below), whose sum is σ = 43892280. Its totient is φ = 11160704.

The previous prime is 22487687. The next prime is 22487737. The reversal of 22487728 is 82778422.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2938 + ... + 7321.

It is an arithmetic number, because the mean of its divisors is an integer number (2194614).

Almost surely, 2^22487728 is an apocalyptic number.

It is an amenable number.

22487728 is a deficient number, since it is larger than the sum of its proper divisors (21404552).

22487728 is a wasteful number, since it uses less digits than its factorization.

22487728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10404 (or 10398 counting only the distinct ones).

The product of its digits is 100352, while the sum is 40.

The square root of 22487728 is about 4742.1227314358. The cubic root of 22487728 is about 282.2594731338.

The spelling of 22487728 in words is "twenty-two million, four hundred eighty-seven thousand, seven hundred twenty-eight".