22197078 has 24 divisors (see below), whose sum is σ = 49876008. Its totient is φ = 7398864.

The previous prime is 22197067. The next prime is 22197079. The reversal of 22197078 is 87079122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22197079) 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 11 ways as a sum of consecutive naturals, for example, 22351 + ... + 23322.

It is an arithmetic number, because the mean of its divisors is an integer number (2078167).

Almost surely, 2^22197078 is an apocalyptic number.

22197078 is an abundant number, since it is smaller than the sum of its proper divisors (27678930).

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

22197078 is an equidigital number, since it uses as much as digits as its factorization.

22197078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45690 (or 45678 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 22197078 is about 4711.3775055710. The cubic root of 22197078 is about 281.0381444569.

The spelling of 22197078 in words is "twenty-two million, one hundred ninety-seven thousand, seventy-eight".