22400022 has 64 divisors (see below), whose sum is σ = 49641984. Its totient is φ = 6716160.

The previous prime is 22400009. The next prime is 22400023. The reversal of 22400022 is 22000422.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22399980 and 22400007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209293 + ... + 209399.

It is an arithmetic number, because the mean of its divisors is an integer number (775656).

Almost surely, 2^22400022 is an apocalyptic number.

22400022 is an abundant number, since it is smaller than the sum of its proper divisors (27241962).

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

22400022 is a wasteful number, since it uses less digits than its factorization.

22400022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22400022 is about 4732.8661506533. The cubic root of 22400022 is about 281.8920415686.

Adding to 22400022 its reverse (22000422), we get a palindrome (44400444).

The spelling of 22400022 in words is "twenty-two million, four hundred thousand, twenty-two".