22458240 has 192 divisors, whose sum is σ = 88788960. Its totient is φ = 5124096.

The previous prime is 22458221. The next prime is 22458253. The reversal of 22458240 is 4285422.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40042 + ... + 40598.

Almost surely, 2^22458240 is an apocalyptic number.

22458240 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 22458240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44394480).

22458240 is an abundant number, since it is smaller than the sum of its proper divisors (66330720).

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

22458240 is a wasteful number, since it uses less digits than its factorization.

22458240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 22458240 is about 4739.0125553748. The cubic root of 22458240 is about 282.1360442118.

The spelling of 22458240 in words is "twenty-two million, four hundred fifty-eight thousand, two hundred forty".