2781798 has 8 divisors (see below), whose sum is σ = 5563608. Its totient is φ = 927264.

The previous prime is 2781797. The next prime is 2781803. The reversal of 2781798 is 8971872.

2781798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

2781798 is an admirable number.

It is a super-2 number, since 2×2781798² = 15476800225608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231811 + ... + 231822.

It is an arithmetic number, because the mean of its divisors is an integer number (695451).

2^2781798 is an apocalyptic number.

2781798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2781798 is a wasteful number, since it uses less digits than its factorization.

2781798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463638.

The product of its digits is 56448, while the sum is 42.

The square root of 2781798 is about 1667.8722972698. The cubic root of 2781798 is about 140.6398939287.

The spelling of 2781798 in words is "two million, seven hundred eighty-one thousand, seven hundred ninety-eight".