22290072 has 32 divisors (see below), whose sum is σ = 63686400. Its totient is φ = 6368544.

The previous prime is 22290061. The next prime is 22290083. The reversal of 22290072 is 27009222.

It is an interprime number because it is at equal distance from previous prime (22290061) and next prime (22290083).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 66172 + ... + 66507.

It is an arithmetic number, because the mean of its divisors is an integer number (1990200).

Almost surely, 2^22290072 is an apocalyptic number.

It is an amenable number.

22290072 is an abundant number, since it is smaller than the sum of its proper divisors (41396328).

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

22290072 is a wasteful number, since it uses less digits than its factorization.

22290072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132695 (or 132691 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 22290072 is about 4721.2362787728. The cubic root of 22290072 is about 281.4300646433.

Adding to 22290072 its reverse (27009222), we get a palindrome (49299294).

The spelling of 22290072 in words is "twenty-two million, two hundred ninety thousand, seventy-two".