22140580 has 72 divisors (see below), whose sum is σ = 58451904. Its totient is φ = 6895680.

The previous prime is 22140577. The next prime is 22140581. The reversal of 22140580 is 8504122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (22140581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16287 + ... + 17593.

It is an arithmetic number, because the mean of its divisors is an integer number (811832).

Almost surely, 2^22140580 is an apocalyptic number.

22140580 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 22140580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29225952).

22140580 is an abundant number, since it is smaller than the sum of its proper divisors (36311324).

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

22140580 is a wasteful number, since it uses less digits than its factorization.

22140580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1332 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 22140580 is about 4705.3777744194. The cubic root of 22140580 is about 280.7995006796.

The spelling of 22140580 in words is "twenty-two million, one hundred forty thousand, five hundred eighty".