2781894874 has 32 divisors (see below), whose sum is σ = 4660898112. Its totient is φ = 1234608000.

The previous prime is 2781894821. The next prime is 2781894881. The reversal of 2781894874 is 4784981872.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176289 + ... + 191419.

It is an arithmetic number, because the mean of its divisors is an integer number (145653066).

Almost surely, 2^2781894874 is an apocalyptic number.

2781894874 is a deficient number, since it is larger than the sum of its proper divisors (1879003238).

2781894874 is a wasteful number, since it uses less digits than its factorization.

2781894874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15342.

The product of its digits is 7225344, while the sum is 58.

The square root of 2781894874 is about 52743.6714118386. The cubic root of 2781894874 is about 1406.4152646884.

The spelling of 2781894874 in words is "two billion, seven hundred eighty-one million, eight hundred ninety-four thousand, eight hundred seventy-four".