2197989126 has 24 divisors (see below), whose sum is σ = 5042446344. Its totient is φ = 689565120.

The previous prime is 2197989121. The next prime is 2197989137. The reversal of 2197989126 is 6219897912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197989121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3591180 + ... + 3591791.

It is an arithmetic number, because the mean of its divisors is an integer number (210101931).

Almost surely, 2^2197989126 is an apocalyptic number.

2197989126 is an abundant number, since it is smaller than the sum of its proper divisors (2844457218).

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

2197989126 is a wasteful number, since it uses less digits than its factorization.

2197989126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182996 (or 7182993 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 2197989126 is about 46882.7167088257. The cubic root of 2197989126 is about 1300.1950646147.

The spelling of 2197989126 in words is "two billion, one hundred ninety-seven million, nine hundred eighty-nine thousand, one hundred twenty-six".