2191198448 has 40 divisors (see below), whose sum is σ = 4291406880. Its totient is φ = 1083801600.

The previous prime is 2191198447. The next prime is 2191198469. The reversal of 2191198448 is 8448911912.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191198447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619148 + ... + 622676.

It is an arithmetic number, because the mean of its divisors is an integer number (107285172).

Almost surely, 2^2191198448 is an apocalyptic number.

It is an amenable number.

2191198448 is a deficient number, since it is larger than the sum of its proper divisors (2100208432).

2191198448 is a wasteful number, since it uses less digits than its factorization.

2191198448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945 (or 3939 counting only the distinct ones).

The product of its digits is 165888, while the sum is 47.

The square root of 2191198448 is about 46810.2387090688. The cubic root of 2191198448 is about 1298.8547009534.

The spelling of 2191198448 in words is "two billion, one hundred ninety-one million, one hundred ninety-eight thousand, four hundred forty-eight".