22528780 has 12 divisors (see below), whose sum is σ = 47310480. Its totient is φ = 9011504.

The previous prime is 22528777. The next prime is 22528789. The reversal of 22528780 is 8782522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22528789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563200 + ... + 563239.

It is an arithmetic number, because the mean of its divisors is an integer number (3942540).

Almost surely, 2^22528780 is an apocalyptic number.

22528780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22528780 is an abundant number, since it is smaller than the sum of its proper divisors (24781700).

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

22528780 is a wasteful number, since it uses less digits than its factorization.

22528780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126448 (or 1126446 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 22528780 is about 4746.4491991382. The cubic root of 22528780 is about 282.4311263430.

The spelling of 22528780 in words is "twenty-two million, five hundred twenty-eight thousand, seven hundred eighty".