22530040 has 64 divisors (see below), whose sum is σ = 56115360. Its totient is φ = 8087040.

The previous prime is 22530037. The next prime is 22530073. The reversal of 22530040 is 4003522.

It is a junction number, because it is equal to n+sod(n) for n = 22529996 and 22530023.

It is a congruent number.

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, 18655 + ... + 19825.

Almost surely, 2^22530040 is an apocalyptic number.

22530040 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 22530040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28057680).

22530040 is an abundant number, since it is smaller than the sum of its proper divisors (33585320).

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

22530040 is a wasteful number, since it uses less digits than its factorization.

22530040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 22530040 is about 4746.5819280826. The cubic root of 22530040 is about 282.4363915577.

Adding to 22530040 its reverse (4003522), we get a palindrome (26533562).

The spelling of 22530040 in words is "twenty-two million, five hundred thirty thousand, forty".