22087242 has 28 divisors (see below), whose sum is σ = 49676850. Its totient is φ = 7361928.

The previous prime is 22087207. The next prime is 22087243. The reversal of 22087242 is 24278022.

It can be written as a sum of positive squares in only one way, i.e., 17065161 + 5022081 = 4131^2 + 2241^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22087243) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 6117 + ... + 9032.

Almost surely, 2^22087242 is an apocalyptic number.

22087242 is an abundant number, since it is smaller than the sum of its proper divisors (27589608).

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

22087242 is an equidigital number, since it uses as much as digits as its factorization.

22087242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15169 (or 15154 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22087242 is about 4699.7065865860. The cubic root of 22087242 is about 280.5738316900.

The spelling of 22087242 in words is "twenty-two million, eighty-seven thousand, two hundred forty-two".