2781324878 has 8 divisors (see below), whose sum is σ = 4210262760. Its totient is φ = 1377903960.

The previous prime is 2781324877. The next prime is 2781324901. The reversal of 2781324878 is 8784231872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781324877) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6378968 + ... + 6379403.

It is an arithmetic number, because the mean of its divisors is an integer number (526282845).

Almost surely, 2^2781324878 is an apocalyptic number.

2781324878 is a deficient number, since it is larger than the sum of its proper divisors (1428937882).

2781324878 is a wasteful number, since it uses less digits than its factorization.

2781324878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12758482.

The product of its digits is 1204224, while the sum is 50.

The square root of 2781324878 is about 52738.2676810682. The cubic root of 2781324878 is about 1406.3192023676.

The spelling of 2781324878 in words is "two billion, seven hundred eighty-one million, three hundred twenty-four thousand, eight hundred seventy-eight".