22520040 has 64 divisors (see below), whose sum is σ = 68592960. Its totient is φ = 5913600.

The previous prime is 22520039. The next prime is 22520051. The reversal of 22520040 is 4002522.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 6640 + ... + 9440.

It is an arithmetic number, because the mean of its divisors is an integer number (1071765).

Almost surely, 2^22520040 is an apocalyptic number.

22520040 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 22520040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34296480).

22520040 is an abundant number, since it is smaller than the sum of its proper divisors (46072920).

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

22520040 is a wasteful number, since it uses less digits than its factorization.

22520040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 22520040 is about 4745.5284215775. The cubic root of 22520040 is about 282.3945987352.

Adding to 22520040 its reverse (4002522), we get a palindrome (26522562).

The spelling of 22520040 in words is "twenty-two million, five hundred twenty thousand, forty".