2806877780 has 72 divisors (see below), whose sum is σ = 6884722656. Its totient is φ = 958440000.

The previous prime is 2806877747. The next prime is 2806877789. The reversal of 2806877780 is 877786082.

It is a happy number.

2806877780 is digitally balanced in base 2, 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 (2806877789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240275 + ... + 251685.

It is an arithmetic number, because the mean of its divisors is an integer number (95621148).

Almost surely, 2^2806877780 is an apocalyptic number.

2806877780 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 2806877780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3442361328).

2806877780 is an abundant number, since it is smaller than the sum of its proper divisors (4077844876).

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

2806877780 is a wasteful number, since it uses less digits than its factorization.

2806877780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11685 (or 11676 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 53.

The square root of 2806877780 is about 52979.9752736824. The cubic root of 2806877780 is about 1410.6128449392.

The spelling of 2806877780 in words is "two billion, eight hundred six million, eight hundred seventy-seven thousand, seven hundred eighty".