22789520 has 80 divisors (see below), whose sum is σ = 60464880. Its totient is φ = 7913472.

The previous prime is 22789513. The next prime is 22789541. The reversal of 22789520 is 2598722.

It can be written as a sum of positive squares in 8 ways, for example, as 55696 + 22733824 = 236^2 + 4768^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17036 + ... + 18324.

It is an arithmetic number, because the mean of its divisors is an integer number (755811).

Almost surely, 2^22789520 is an apocalyptic number.

22789520 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 22789520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30232440).

22789520 is an abundant number, since it is smaller than the sum of its proper divisors (37675360).

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

22789520 is a wasteful number, since it uses less digits than its factorization.

22789520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 22789520 is about 4773.8370311522. The cubic root of 22789520 is about 283.5165351120.

The spelling of 22789520 in words is "twenty-two million, seven hundred eighty-nine thousand, five hundred twenty".