22545378 has 20 divisors (see below), whose sum is σ = 50518710. Its totient is φ = 7515072.

The previous prime is 22545377. The next prime is 22545379. The reversal of 22545378 is 87354522.

It is an interprime number because it is at equal distance from previous prime (22545377) and next prime (22545379).

It can be written as a sum of positive squares in only one way, i.e., 20007729 + 2537649 = 4473^2 + 1593^2 .

It is not an unprimeable number, because it can be changed into a prime (22545377) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 69423 + ... + 69746.

Almost surely, 2^22545378 is an apocalyptic number.

22545378 is an abundant number, since it is smaller than the sum of its proper divisors (27973332).

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

22545378 is a wasteful number, since it uses less digits than its factorization.

22545378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139183 (or 139174 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 22545378 is about 4748.1973421500. The cubic root of 22545378 is about 282.5004693651.

The spelling of 22545378 in words is "twenty-two million, five hundred forty-five thousand, three hundred seventy-eight".