22400056 has 24 divisors (see below), whose sum is σ = 48858120. Its totient is φ = 9599856.

The previous prime is 22400051. The next prime is 22400057. The reversal of 22400056 is 65000422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28180 + ... + 28963.

It is an arithmetic number, because the mean of its divisors is an integer number (2035755).

Almost surely, 2^22400056 is an apocalyptic number.

It is an amenable number.

22400056 is an abundant number, since it is smaller than the sum of its proper divisors (26458064).

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

22400056 is a wasteful number, since it uses less digits than its factorization.

22400056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57163 (or 57152 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22400056 is about 4732.8697425558. The cubic root of 22400056 is about 281.8921841924.

Adding to 22400056 its reverse (65000422), we get a palindrome (87400478).

The spelling of 22400056 in words is "twenty-two million, four hundred thousand, fifty-six".