22451328 has 48 divisors (see below), whose sum is σ = 64609350. Its totient is φ = 7483392.

The previous prime is 22451327. The next prime is 22451353. The reversal of 22451328 is 82315422.

It can be written as a sum of positive squares in only one way, i.e., 22353984 + 97344 = 4728^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (22451321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8593 + ... + 10896.

Almost surely, 2^22451328 is an apocalyptic number.

It is an amenable number.

22451328 is an abundant number, since it is smaller than the sum of its proper divisors (42158022).

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

22451328 is a wasteful number, since it uses less digits than its factorization.

22451328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19509 (or 19494 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 22451328 is about 4738.2832334085. The cubic root of 22451328 is about 282.1070967900.

The spelling of 22451328 in words is "twenty-two million, four hundred fifty-one thousand, three hundred twenty-eight".