22287872 has 40 divisors (see below), whose sum is σ = 45077472. Its totient is φ = 11008000.

The previous prime is 22287871. The next prime is 22287929. The reversal of 22287872 is 27878222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51497 + ... + 51927.

Almost surely, 2^22287872 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 22287872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22538736).

22287872 is an abundant number, since it is smaller than the sum of its proper divisors (22789600).

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

22287872 is an equidigital number, since it uses as much as digits as its factorization.

22287872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 534 counting only the distinct ones).

The product of its digits is 50176, while the sum is 38.

The square root of 22287872 is about 4721.0032832016. The cubic root of 22287872 is about 281.4208054162.

The spelling of 22287872 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred seventy-two".