2989878768 has 30 divisors (see below), whose sum is σ = 8367508344. Its totient is φ = 996626208.

The previous prime is 2989878751. The next prime is 2989878769. The reversal of 2989878768 is 8678789892.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 2989878696 and 2989878705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2989878769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10381380 + ... + 10381667.

Almost surely, 2^2989878768 is an apocalyptic number.

It is an amenable number.

2989878768 is an abundant number, since it is smaller than the sum of its proper divisors (5377629576).

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

2989878768 is a wasteful number, since it uses less digits than its factorization.

2989878768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20763061 (or 20763052 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 72.

The square root of 2989878768 is about 54679.7839059373. The cubic root of 2989878768 is about 1440.6258159475.

The spelling of 2989878768 in words is "two billion, nine hundred eighty-nine million, eight hundred seventy-eight thousand, seven hundred sixty-eight".