2781797278 has 32 divisors (see below), whose sum is σ = 4788431424. Its totient is φ = 1200655872.

The previous prime is 2781797257. The next prime is 2781797279. The reversal of 2781797278 is 8727971872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781797279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49351 + ... + 89437.

It is an arithmetic number, because the mean of its divisors is an integer number (149638482).

Almost surely, 2^2781797278 is an apocalyptic number.

2781797278 is a deficient number, since it is larger than the sum of its proper divisors (2006634146).

2781797278 is a wasteful number, since it uses less digits than its factorization.

2781797278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40276.

The product of its digits is 5531904, while the sum is 58.

The square root of 2781797278 is about 52742.7462121570. The cubic root of 2781797278 is about 1406.3988176123.

The spelling of 2781797278 in words is "two billion, seven hundred eighty-one million, seven hundred ninety-seven thousand, two hundred seventy-eight".