1215278196 has 48 divisors (see below), whose sum is σ = 3099176640. Its totient is φ = 367582720.

The previous prime is 1215278191. The next prime is 1215278203. The reversal of 1215278196 is 6918725121.

1215278196 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215278191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65260 + ... + 81788.

It is an arithmetic number, because the mean of its divisors is an integer number (64566180).

Almost surely, 2^1215278196 is an apocalyptic number.

It is an amenable number.

1215278196 is an abundant number, since it is smaller than the sum of its proper divisors (1883898444).

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

1215278196 is a wasteful number, since it uses less digits than its factorization.

1215278196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17104 (or 17102 counting only the distinct ones).

The product of its digits is 60480, while the sum is 42.

The square root of 1215278196 is about 34860.8404373733. The cubic root of 1215278196 is about 1067.1494265715.

The spelling of 1215278196 in words is "one billion, two hundred fifteen million, two hundred seventy-eight thousand, one hundred ninety-six".