22550640 has 160 divisors (see below), whose sum is σ = 82661376. Its totient is φ = 4976640.

The previous prime is 22550639. The next prime is 22550641. The reversal of 22550640 is 4605522.

It is an interprime number because it is at equal distance from previous prime (22550639) and next prime (22550641).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22550640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22550641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51864 + ... + 52296.

Almost surely, 2^22550640 is an apocalyptic number.

22550640 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 22550640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41330688).

22550640 is an abundant number, since it is smaller than the sum of its proper divisors (60110736).

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

22550640 is a wasteful number, since it uses less digits than its factorization.

22550640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 22550640 is about 4748.7514148458. The cubic root of 22550640 is about 282.5224458110.

The spelling of 22550640 in words is "twenty-two million, five hundred fifty thousand, six hundred forty".