22536840 has 64 divisors (see below), whose sum is σ = 68270400. Its totient is φ = 5951232.

The previous prime is 22536827. The next prime is 22536841. The reversal of 22536840 is 4863522.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22536798 and 22536807.

It is not an unprimeable number, because it can be changed into a prime (22536841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12219 + ... + 13941.

It is an arithmetic number, because the mean of its divisors is an integer number (1066725).

Almost surely, 2^22536840 is an apocalyptic number.

22536840 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 22536840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34135200).

22536840 is an abundant number, since it is smaller than the sum of its proper divisors (45733560).

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

22536840 is a wasteful number, since it uses less digits than its factorization.

22536840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 22536840 is about 4747.2981789645. The cubic root of 22536840 is about 282.4648036136.

The spelling of 22536840 in words is "twenty-two million, five hundred thirty-six thousand, eight hundred forty".