2796781 has 16 divisors (see below), whose sum is σ = 3236800. Its totient is φ = 2409264.

The previous prime is 2796779. The next prime is 2796797. The reversal of 2796781 is 1876972.

It is not a de Polignac number, because 2796781 - 2¹ = 2796779 is a prime.

It is a super-2 number, since 2×2796781² = 15643967923922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

2796781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2796701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41710 + ... + 41776.

It is an arithmetic number, because the mean of its divisors is an integer number (202300).

2^2796781 is an apocalyptic number.

It is an amenable number.

2796781 is a deficient number, since it is larger than the sum of its proper divisors (440019).

2796781 is an equidigital number, since it uses as much as digits as its factorization.

2796781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 99 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 2796781 is about 1672.3579162368. The cubic root of 2796781 is about 140.8919414187.

The spelling of 2796781 in words is "two million, seven hundred ninety-six thousand, seven hundred eighty-one".