2806640078 has 16 divisors (see below), whose sum is σ = 4597893504. Its totient is φ = 1274298360.

The previous prime is 2806640077. The next prime is 2806640129. The reversal of 2806640078 is 8700466082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806640077) 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 7 ways as a sum of consecutive naturals, for example, 52400 + ... + 91427.

It is an arithmetic number, because the mean of its divisors is an integer number (287368344).

Almost surely, 2^2806640078 is an apocalyptic number.

2806640078 is a deficient number, since it is larger than the sum of its proper divisors (1791253426).

2806640078 is a wasteful number, since it uses less digits than its factorization.

2806640078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144727.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 2806640078 is about 52977.7319069059. The cubic root of 2806640078 is about 1410.5730243050.

The spelling of 2806640078 in words is "two billion, eight hundred six million, six hundred forty thousand, seventy-eight".