22801660 has 72 divisors (see below), whose sum is σ = 56881440. Its totient is φ = 7652736.

The previous prime is 22801609. The next prime is 22801661. The reversal of 22801660 is 6610822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22801661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51721 + ... + 52159.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^22801660 is an apocalyptic number.

22801660 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 22801660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28440720).

22801660 is an abundant number, since it is smaller than the sum of its proper divisors (34079780).

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

22801660 is a wasteful number, since it uses less digits than its factorization.

22801660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 22801660 is about 4775.1083757335. The cubic root of 22801660 is about 283.5668693555.

The spelling of 22801660 in words is "twenty-two million, eight hundred one thousand, six hundred sixty".