22890000 has 200 divisors, whose sum is σ = 85222720. Its totient is φ = 5184000.

The previous prime is 22889969. The next prime is 22890029. The reversal of 22890000 is 9822.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 209946 + ... + 210054.

Almost surely, 2^22890000 is an apocalyptic number.

22890000 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 22890000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42611360).

22890000 is an abundant number, since it is smaller than the sum of its proper divisors (62332720).

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

22890000 is a wasteful number, since it uses less digits than its factorization.

22890000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 22890000 is about 4784.3494855623. The cubic root of 22890000 is about 283.9326031965.

Adding to 22890000 its reverse (9822), we get a palindrome (22899822).

The spelling of 22890000 in words is "twenty-two million, eight hundred ninety thousand".