22087680 has 96 divisors (see below), whose sum is σ = 70761600. Its totient is φ = 5881856.

The previous prime is 22087679. The next prime is 22087687. The reversal of 22087680 is 8678022.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (22087687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30361 + ... + 31079.

It is an arithmetic number, because the mean of its divisors is an integer number (737100).

Almost surely, 2^22087680 is an apocalyptic number.

22087680 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 22087680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

22087680 is an abundant number, since it is smaller than the sum of its proper divisors (48673920).

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

22087680 is an equidigital number, since it uses as much as digits as its factorization.

22087680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 22087680 is about 4699.7531850088. The cubic root of 22087680 is about 280.5756863131.

The spelling of 22087680 in words is "twenty-two million, eighty-seven thousand, six hundred eighty".