2781936 has 30 divisors (see below), whose sum is σ = 7785960. Its totient is φ = 927264.

The previous prime is 2781929. The next prime is 2781937. The reversal of 2781936 is 6391872.

2781936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 2781936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781937) 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 5 ways as a sum of consecutive naturals, for example, 9516 + ... + 9803.

It is an arithmetic number, because the mean of its divisors is an integer number (259532).

2^2781936 is an apocalyptic number.

It is an amenable number.

2781936 is an abundant number, since it is smaller than the sum of its proper divisors (5004024).

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

2781936 is a wasteful number, since it uses less digits than its factorization.

2781936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19333 (or 19324 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2781936 is about 1667.9136668305. The cubic root of 2781936 is about 140.6422195210.

The spelling of 2781936 in words is "two million, seven hundred eighty-one thousand, nine hundred thirty-six".