22502988 has 48 divisors (see below), whose sum is σ = 58800000. Its totient is φ = 7442064.

The previous prime is 22502983. The next prime is 22502999. The reversal of 22502988 is 88920522.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22502981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14263 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (1225000).

Almost surely, 2^22502988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22502988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29400000).

22502988 is an abundant number, since it is smaller than the sum of its proper divisors (36297012).

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

22502988 is a wasteful number, since it uses less digits than its factorization.

22502988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651 (or 1643 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 22502988 is about 4743.7314426514. The cubic root of 22502988 is about 282.3233050696.

The spelling of 22502988 in words is "twenty-two million, five hundred two thousand, nine hundred eighty-eight".