22509880 has 32 divisors (see below), whose sum is σ = 51224400. Its totient is φ = 8901376.

The previous prime is 22509871. The next prime is 22509881. The reversal of 22509880 is 8890522.

It is a super-2 number, since 2×22509880² = 1013389395228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22509881) 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, 399 + ... + 6721.

Almost surely, 2^22509880 is an apocalyptic number.

22509880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22509880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25612200).

22509880 is an abundant number, since it is smaller than the sum of its proper divisors (28714520).

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

22509880 is a wasteful number, since it uses less digits than its factorization.

22509880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6423 (or 6419 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 22509880 is about 4744.4578193931. The cubic root of 22509880 is about 282.3521245551.

The spelling of 22509880 in words is "twenty-two million, five hundred nine thousand, eight hundred eighty".