22287000 has 256 divisors, whose sum is σ = 80870400. Its totient is φ = 5068800.

The previous prime is 22286959. The next prime is 22287049. The reversal of 22287000 is 78222.

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, 968989 + ... + 969011.

It is an arithmetic number, because the mean of its divisors is an integer number (315900).

Almost surely, 2^22287000 is an apocalyptic number.

22287000 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 22287000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40435200).

22287000 is an abundant number, since it is smaller than the sum of its proper divisors (58583400).

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

22287000 is a wasteful number, since it uses less digits than its factorization.

22287000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 22287000 is about 4720.9109290475. The cubic root of 22287000 is about 281.4171352267.

The spelling of 22287000 in words is "twenty-two million, two hundred eighty-seven thousand".