22494240 has 192 divisors, whose sum is σ = 81285120. Its totient is φ = 5806080.

The previous prime is 22494229. The next prime is 22494259. The reversal of 22494240 is 4249422.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177057 + ... + 177183.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^22494240 is an apocalyptic number.

22494240 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 22494240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

22494240 is an abundant number, since it is smaller than the sum of its proper divisors (58790880).

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

22494240 is a wasteful number, since it uses less digits than its factorization.

22494240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22494240 is about 4742.8092940788. The cubic root of 22494240 is about 282.2867160860.

The spelling of 22494240 in words is "twenty-two million, four hundred ninety-four thousand, two hundred forty".