22890840 has 192 divisors, whose sum is σ = 84952800. Its totient is φ = 4902912.

The previous prime is 22890821. The next prime is 22890851. The reversal of 22890840 is 4809822.

It is a super-4 number, since 4×22890840⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99846 + ... + 100074.

Almost surely, 2^22890840 is an apocalyptic number.

22890840 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 22890840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42476400).

22890840 is an abundant number, since it is smaller than the sum of its proper divisors (62061960).

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

22890840 is a wasteful number, since it uses less digits than its factorization.

22890840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 22890840 is about 4784.4372709860. The cubic root of 22890840 is about 283.9360763357.

The spelling of 22890840 in words is "twenty-two million, eight hundred ninety thousand, eight hundred forty".