22089780 has 96 divisors (see below), whose sum is σ = 72374400. Its totient is φ = 5577984.

The previous prime is 22089773. The next prime is 22089787. The reversal of 22089780 is 8798022.

It is an interprime number because it is at equal distance from previous prime (22089773) and next prime (22089787).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22089787) 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, 9184 + ... + 11336.

It is an arithmetic number, because the mean of its divisors is an integer number (753900).

Almost surely, 2^22089780 is an apocalyptic number.

22089780 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 22089780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36187200).

22089780 is an abundant number, since it is smaller than the sum of its proper divisors (50284620).

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

22089780 is a wasteful number, since it uses less digits than its factorization.

22089780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 22089780 is about 4699.9765956864. The cubic root of 22089780 is about 280.5845780009.

It can be divided in two parts, 220 and 89780, that added together give a square (90000 = 300²).

The spelling of 22089780 in words is "twenty-two million, eighty-nine thousand, seven hundred eighty".