2797978660 has 48 divisors (see below), whose sum is σ = 6262704000. Its totient is φ = 1046361600.

The previous prime is 2797978607. The next prime is 2797978693. The reversal of 2797978660 is 668797972.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24091 + ... + 78589.

It is an arithmetic number, because the mean of its divisors is an integer number (130473000).

Almost surely, 2^2797978660 is an apocalyptic number.

2797978660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2797978660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3131352000).

2797978660 is an abundant number, since it is smaller than the sum of its proper divisors (3464725340).

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

2797978660 is a wasteful number, since it uses less digits than its factorization.

2797978660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54676 (or 54674 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 61.

The square root of 2797978660 is about 52895.9229052675. The cubic root of 2797978660 is about 1409.1204984119.

The spelling of 2797978660 in words is "two billion, seven hundred ninety-seven million, nine hundred seventy-eight thousand, six hundred sixty".