2726778 has 16 divisors (see below), whose sum is σ = 5474016. Its totient is φ = 905520.

The previous prime is 2726771. The next prime is 2726809. The reversal of 2726778 is 8776272.

It is a super-2 number, since 2×2726778² = 14870636522568, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2726771) 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 7 ways as a sum of consecutive naturals, for example, 1300 + ... + 2672.

It is an arithmetic number, because the mean of its divisors is an integer number (342126).

2^2726778 is an apocalyptic number.

2726778 is an abundant number, since it is smaller than the sum of its proper divisors (2747238).

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

2726778 is a wasteful number, since it uses less digits than its factorization.

2726778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709.

The product of its digits is 65856, while the sum is 39.

The square root of 2726778 is about 1651.2958547759. The cubic root of 2726778 is about 139.7064939464.

The spelling of 2726778 in words is "two million, seven hundred twenty-six thousand, seven hundred seventy-eight".