22542240 has 96 divisors (see below), whose sum is σ = 81164160. Its totient is φ = 5151744.

The previous prime is 22542229. The next prime is 22542263. The reversal of 22542240 is 4224522.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 6 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (845460).

Almost surely, 2^22542240 is an apocalyptic number.

22542240 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 22542240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40582080).

22542240 is an abundant number, since it is smaller than the sum of its proper divisors (58621920).

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

22542240 is a wasteful number, since it uses less digits than its factorization.

22542240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734 (or 6726 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22542240 is about 4747.8668894568. The cubic root of 22542240 is about 282.4873620577.

Adding to 22542240 its reverse (4224522), we get a palindrome (26766762).

The spelling of 22542240 in words is "twenty-two million, five hundred forty-two thousand, two hundred forty".