2780860556 has 12 divisors (see below), whose sum is σ = 4874102520. Its totient is φ = 1388259840.

The previous prime is 2780860553. The next prime is 2780860567. The reversal of 2780860556 is 6550680872.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2780860556.

It is not an unprimeable number, because it can be changed into a prime (2780860553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539726 + ... + 544853.

It is an arithmetic number, because the mean of its divisors is an integer number (406175210).

Almost surely, 2^2780860556 is an apocalyptic number.

It is an amenable number.

2780860556 is a deficient number, since it is larger than the sum of its proper divisors (2093241964).

2780860556 is a wasteful number, since it uses less digits than its factorization.

2780860556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085224 (or 1085222 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 2780860556 is about 52733.8653618337. The cubic root of 2780860556 is about 1406.2409397513.

The spelling of 2780860556 in words is "two billion, seven hundred eighty million, eight hundred sixty thousand, five hundred fifty-six".