22286720 has 64 divisors (see below), whose sum is σ = 53978400. Its totient is φ = 8798208.

The previous prime is 22286717. The next prime is 22286723. The reversal of 22286720 is 2768222.

It is an interprime number because it is at equal distance from previous prime (22286717) and next prime (22286723).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22286723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61901 + ... + 62259.

Almost surely, 2^22286720 is an apocalyptic number.

22286720 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 22286720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26989200).

22286720 is an abundant number, since it is smaller than the sum of its proper divisors (31691680).

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

22286720 is an equidigital number, since it uses as much as digits as its factorization.

22286720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 22286720 is about 4720.8812736607. The cubic root of 22286720 is about 281.4159567052.

The spelling of 22286720 in words is "twenty-two million, two hundred eighty-six thousand, seven hundred twenty".