22755840 has 80 divisors (see below), whose sum is σ = 72772128. Its totient is φ = 6066176.

The previous prime is 22755839. The next prime is 22755841. The reversal of 22755840 is 4855722.

It is an interprime number because it is at equal distance from previous prime (22755839) and next prime (22755841).

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

It is not an unprimeable number, because it can be changed into a prime (22755841) 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, 6199 + ... + 9161.

Almost surely, 2^22755840 is an apocalyptic number.

22755840 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 22755840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36386064).

22755840 is an abundant number, since it is smaller than the sum of its proper divisors (50016288).

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

22755840 is an equidigital number, since it uses as much as digits as its factorization.

22755840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 22755840 is about 4770.3081661461. The cubic root of 22755840 is about 283.3767991755.

The spelling of 22755840 in words is "twenty-two million, seven hundred fifty-five thousand, eight hundred forty".