22745500 has 24 divisors (see below), whose sum is σ = 49677264. Its totient is φ = 9098000.

The previous prime is 22745479. The next prime is 22745519. The reversal of 22745500 is 554722.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22246 + ... + 23245.

It is an arithmetic number, because the mean of its divisors is an integer number (2069886).

Almost surely, 2^22745500 is an apocalyptic number.

22745500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22745500 is an abundant number, since it is smaller than the sum of its proper divisors (26931764).

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

22745500 is a wasteful number, since it uses less digits than its factorization.

22745500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45510 (or 45498 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 22745500 is about 4769.2242555787. The cubic root of 22745500 is about 283.3338715868. Note that the first 3 decimals are identical.

The spelling of 22745500 in words is "twenty-two million, seven hundred forty-five thousand, five hundred".