22287500 has 36 divisors (see below), whose sum is σ = 48778128. Its totient is φ = 8910000.

The previous prime is 22287491. The next prime is 22287511. The reversal of 22287500 is 578222.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22287500.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11609 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (1354948).

Almost surely, 2^22287500 is an apocalyptic number.

22287500 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 22287500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24389064).

22287500 is an abundant number, since it is smaller than the sum of its proper divisors (26490628).

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

22287500 is an equidigital number, since it uses as much as digits as its factorization.

22287500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 22287500 is about 4720.9638846320. The cubic root of 22287500 is about 281.4192397049.

The spelling of 22287500 in words is "twenty-two million, two hundred eighty-seven thousand, five hundred".