22728250 has 32 divisors (see below), whose sum is σ = 42840720. Its totient is φ = 9028800.

The previous prime is 22728247. The next prime is 22728253. The reversal of 22728250 is 5282722.

It is an interprime number because it is at equal distance from previous prime (22728247) and next prime (22728253).

It can be written as a sum of positive squares in 8 ways, for example, as 5745609 + 16982641 = 2397^2 + 4121^2 .

It is not an unprimeable number, because it can be changed into a prime (22728253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57052 + ... + 57448.

Almost surely, 2^22728250 is an apocalyptic number.

22728250 is a deficient number, since it is larger than the sum of its proper divisors (20112470).

22728250 is a wasteful number, since it uses less digits than its factorization.

22728250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 22728250 is about 4767.4154423545. The cubic root of 22728250 is about 283.2622274469.

The spelling of 22728250 in words is "twenty-two million, seven hundred twenty-eight thousand, two hundred fifty".