22155798 has 32 divisors (see below), whose sum is σ = 51505920. Its totient is φ = 6222240.

The previous prime is 22155779. The next prime is 22155823. The reversal of 22155798 is 89755122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1993 + ... + 6948.

It is an arithmetic number, because the mean of its divisors is an integer number (1609560).

Almost surely, 2^22155798 is an apocalyptic number.

22155798 is an abundant number, since it is smaller than the sum of its proper divisors (29350122).

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

22155798 is a wasteful number, since it uses less digits than its factorization.

22155798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012.

The product of its digits is 50400, while the sum is 39.

The square root of 22155798 is about 4706.9945825335. The cubic root of 22155798 is about 280.8638204058.

The spelling of 22155798 in words is "twenty-two million, one hundred fifty-five thousand, seven hundred ninety-eight".