22290678 has 12 divisors (see below), whose sum is σ = 48296508. Its totient is φ = 7430220.

The previous prime is 22290661. The next prime is 22290679. The reversal of 22290678 is 87609222.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22290679) 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 5 ways as a sum of consecutive naturals, for example, 619168 + ... + 619203.

It is an arithmetic number, because the mean of its divisors is an integer number (4024709).

Almost surely, 2^22290678 is an apocalyptic number.

22290678 is an abundant number, since it is smaller than the sum of its proper divisors (26005830).

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

22290678 is a wasteful number, since it uses less digits than its factorization.

22290678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238379 (or 1238376 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 22290678 is about 4721.3004564421. The cubic root of 22290678 is about 281.4326150324.

The spelling of 22290678 in words is "twenty-two million, two hundred ninety thousand, six hundred seventy-eight".