22545040 has 80 divisors (see below), whose sum is σ = 60567552. Its totient is φ = 7644672.

The previous prime is 22545013. The next prime is 22545053. The reversal of 22545040 is 4054522.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70962 + ... + 71278.

Almost surely, 2^22545040 is an apocalyptic number.

22545040 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 22545040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30283776).

22545040 is an abundant number, since it is smaller than the sum of its proper divisors (38022512).

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

22545040 is a wasteful number, since it uses less digits than its factorization.

22545040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 22545040 is about 4748.1617495616. The cubic root of 22545040 is about 282.4990576103.

Adding to 22545040 its reverse (4054522), we get a palindrome (26599562).

The spelling of 22545040 in words is "twenty-two million, five hundred forty-five thousand, forty".