22905040 has 40 divisors (see below), whose sum is σ = 53869320. Its totient is φ = 9056256.

The previous prime is 22905017. The next prime is 22905049. The reversal of 22905040 is 4050922.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3297856 + 19607184 = 1816^2 + 4428^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22905049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5512 + ... + 8728.

It is an arithmetic number, because the mean of its divisors is an integer number (1346733).

Almost surely, 2^22905040 is an apocalyptic number.

22905040 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 22905040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26934660).

22905040 is an abundant number, since it is smaller than the sum of its proper divisors (30964280).

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

22905040 is a wasteful number, since it uses less digits than its factorization.

22905040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319 (or 3313 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 22905040 is about 4785.9210189889. The cubic root of 22905040 is about 283.9947760727.

Adding to 22905040 its reverse (4050922), we get a palindrome (26955962).

The spelling of 22905040 in words is "twenty-two million, nine hundred five thousand, forty".