22621140 has 96 divisors (see below), whose sum is σ = 71084160. Its totient is φ = 5971968.

The previous prime is 22621127. The next prime is 22621141. The reversal of 22621140 is 4112622.

22621140 is a `hidden beast` number, since 2 + 2 + 621 + 1 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22621141) 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 31 ways as a sum of consecutive naturals, for example, 87892 + ... + 88148.

It is an arithmetic number, because the mean of its divisors is an integer number (740460).

Almost surely, 2^22621140 is an apocalyptic number.

22621140 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 22621140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35542080).

22621140 is an abundant number, since it is smaller than the sum of its proper divisors (48463020).

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

22621140 is a wasteful number, since it uses less digits than its factorization.

22621140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22621140 is about 4756.1686261107. The cubic root of 22621140 is about 282.8165558976.

Adding to 22621140 its reverse (4112622), we get a palindrome (26733762).

The spelling of 22621140 in words is "twenty-two million, six hundred twenty-one thousand, one hundred forty".