22187088 has 320 divisors, whose sum is σ = 85708800. Its totient is φ = 5322240.

The previous prime is 22187047. The next prime is 22187131. The reversal of 22187088 is 88078122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 765058 + ... + 765086.

It is an arithmetic number, because the mean of its divisors is an integer number (267840).

Almost surely, 2^22187088 is an apocalyptic number.

22187088 is a gapful number since it is divisible by the number (28) 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 22187088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42854400).

22187088 is an abundant number, since it is smaller than the sum of its proper divisors (63521712).

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

22187088 is a wasteful number, since it uses less digits than its factorization.

22187088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 22187088 is about 4710.3171867720. The cubic root of 22187088 is about 280.9959768593.

The spelling of 22187088 in words is "twenty-two million, one hundred eighty-seven thousand, eighty-eight".