22608720 has 120 divisors (see below), whose sum is σ = 78807456. Its totient is φ = 6023808.

The previous prime is 22608713. The next prime is 22608721. The reversal of 22608720 is 2780622.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×22608720² = 1022308440076800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22608721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18859 + ... + 20021.

Almost surely, 2^22608720 is an apocalyptic number.

22608720 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 22608720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39403728).

22608720 is an abundant number, since it is smaller than the sum of its proper divisors (56198736).

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

22608720 is a wasteful number, since it uses less digits than its factorization.

22608720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 22608720 is about 4754.8627740451. The cubic root of 22608720 is about 282.7647868492.

The spelling of 22608720 in words is "twenty-two million, six hundred eight thousand, seven hundred twenty".