22421880 has 128 divisors (see below), whose sum is σ = 80539200. Its totient is φ = 5515776.

The previous prime is 22421879. The next prime is 22421887. The reversal of 22421880 is 8812422.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22421887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13242 + ... + 14838.

Almost surely, 2^22421880 is an apocalyptic number.

22421880 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 22421880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40269600).

22421880 is an abundant number, since it is smaller than the sum of its proper divisors (58117320).

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

22421880 is a wasteful number, since it uses less digits than its factorization.

22421880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 22421880 is about 4735.1747591826. The cubic root of 22421880 is about 281.9837020911.

The spelling of 22421880 in words is "twenty-two million, four hundred twenty-one thousand, eight hundred eighty".