22920040 has 64 divisors (see below), whose sum is σ = 60600960. Its totient is φ = 7691520.

The previous prime is 22920019. The next prime is 22920049. The reversal of 22920040 is 4002922.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22920049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3717 + ... + 7723.

It is an arithmetic number, because the mean of its divisors is an integer number (946890).

Almost surely, 2^22920040 is an apocalyptic number.

22920040 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 22920040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30300480).

22920040 is an abundant number, since it is smaller than the sum of its proper divisors (37680920).

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

22920040 is a wasteful number, since it uses less digits than its factorization.

22920040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042 (or 4038 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 22920040 is about 4787.4878589924. The cubic root of 22920040 is about 284.0567564937.

Adding to 22920040 its reverse (4002922), we get a palindrome (26922962).

The spelling of 22920040 in words is "twenty-two million, nine hundred twenty thousand, forty".