22681398 has 32 divisors (see below), whose sum is σ = 47139840. Its totient is φ = 7267680.

The previous prime is 22681397. The next prime is 22681433. The reversal of 22681398 is 89318622.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22681391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36333 + ... + 36951.

It is an arithmetic number, because the mean of its divisors is an integer number (1473120).

Almost surely, 2^22681398 is an apocalyptic number.

22681398 is an abundant number, since it is smaller than the sum of its proper divisors (24458442).

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

22681398 is a wasteful number, since it uses less digits than its factorization.

22681398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852.

The product of its digits is 41472, while the sum is 39.

The square root of 22681398 is about 4762.4991338582. The cubic root of 22681398 is about 283.0674546926.

The spelling of 22681398 in words is "twenty-two million, six hundred eighty-one thousand, three hundred ninety-eight".