22728975 has 12 divisors (see below), whose sum is σ = 37578696. Its totient is φ = 12122080.

The previous prime is 22728967. The next prime is 22728977. The reversal of 22728975 is 57982722.

It is a happy number.

It is not a de Polignac number, because 22728975 - 2³ = 22728967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22728977) 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 11 ways as a sum of consecutive naturals, for example, 151452 + ... + 151601.

It is an arithmetic number, because the mean of its divisors is an integer number (3131558).

Almost surely, 2^22728975 is an apocalyptic number.

22728975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22728975 is a deficient number, since it is larger than the sum of its proper divisors (14849721).

22728975 is a wasteful number, since it uses less digits than its factorization.

22728975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303066 (or 303061 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 22728975 is about 4767.4914787548. The cubic root of 22728975 is about 283.2652393070.

The spelling of 22728975 in words is "twenty-two million, seven hundred twenty-eight thousand, nine hundred seventy-five".