2778056538 has 32 divisors (see below), whose sum is σ = 5984563200. Its totient is φ = 856877616.

The previous prime is 2778056527. The next prime is 2778056543. The reversal of 2778056538 is 8356508772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278458 + ... + 288261.

It is an arithmetic number, because the mean of its divisors is an integer number (187017600).

Almost surely, 2^2778056538 is an apocalyptic number.

2778056538 is an abundant number, since it is smaller than the sum of its proper divisors (3206506662).

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

2778056538 is a wasteful number, since it uses less digits than its factorization.

2778056538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566786.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The square root of 2778056538 is about 52707.2721547985. The cubic root of 2778056538 is about 1405.7681303588.

The spelling of 2778056538 in words is "two billion, seven hundred seventy-eight million, fifty-six thousand, five hundred thirty-eight".