2730778 has 8 divisors (see below), whose sum is σ = 4337172. Its totient is φ = 1285056.

The previous prime is 2730769. The next prime is 2730781. The reversal of 2730778 is 8770372.

2730778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2699449 + 31329 = 1643^2 + 177^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 80317 = 2730778 / (2 + 7 + 3 + 0 + 7 + 7 + 8).

It is an unprimeable number.

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, 40125 + ... + 40192.

2^2730778 is an apocalyptic number.

2730778 is a deficient number, since it is larger than the sum of its proper divisors (1606394).

2730778 is a wasteful number, since it uses less digits than its factorization.

2730778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80336.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 2730778 is about 1652.5065809249. The cubic root of 2730778 is about 139.7747739145.

The spelling of 2730778 in words is "two million, seven hundred thirty thousand, seven hundred seventy-eight".