2806949880 has 192 divisors, whose sum is σ = 10477209600. Its totient is φ = 638426880.

The previous prime is 2806949851. The next prime is 2806949881. The reversal of 2806949880 is 889496082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806949881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 529081 + ... + 534359.

It is an arithmetic number, because the mean of its divisors is an integer number (54568800).

Almost surely, 2^2806949880 is an apocalyptic number.

2806949880 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 2806949880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5238604800).

2806949880 is an abundant number, since it is smaller than the sum of its proper divisors (7670259720).

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

2806949880 is a wasteful number, since it uses less digits than its factorization.

2806949880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514 (or 5507 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 2806949880 is about 52980.6557150815. The cubic root of 2806949880 is about 1410.6249229280.

The spelling of 2806949880 in words is "two billion, eight hundred six million, nine hundred forty-nine thousand, eight hundred eighty".