2196860256 has 72 divisors (see below), whose sum is σ = 6576144120. Its totient is φ = 693743616.

The previous prime is 2196860251. The next prime is 2196860257. The reversal of 2196860256 is 6520686912.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196860251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195265 + ... + 206208.

It is an arithmetic number, because the mean of its divisors is an integer number (91335335).

Almost surely, 2^2196860256 is an apocalyptic number.

It is an amenable number.

2196860256 is an abundant number, since it is smaller than the sum of its proper divisors (4379283864).

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

2196860256 is a wasteful number, since it uses less digits than its factorization.

2196860256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401508 (or 401497 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2196860256 is about 46870.6758645531. The cubic root of 2196860256 is about 1299.9724364965.

The spelling of 2196860256 in words is "two billion, one hundred ninety-six million, eight hundred sixty thousand, two hundred fifty-six".