22556780 has 24 divisors (see below), whose sum is σ = 49003920. Its totient is φ = 8711360.

The previous prime is 22556761. The next prime is 22556789. The reversal of 22556780 is 8765522.

It is a self number, because there is not a number n which added to its sum of digits gives 22556780.

It is not an unprimeable number, because it can be changed into a prime (22556789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18866 + ... + 20025.

It is an arithmetic number, because the mean of its divisors is an integer number (2041830).

Almost surely, 2^22556780 is an apocalyptic number.

22556780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22556780 is an abundant number, since it is smaller than the sum of its proper divisors (26447140).

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

22556780 is a wasteful number, since it uses less digits than its factorization.

22556780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38929 (or 38927 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 22556780 is about 4749.3978565709. The cubic root of 22556780 is about 282.5480848527.

The spelling of 22556780 in words is "twenty-two million, five hundred fifty-six thousand, seven hundred eighty".