2729778 has 32 divisors (see below), whose sum is σ = 5778432. Its totient is φ = 858000.

The previous prime is 2729777. The next prime is 2729803. The reversal of 2729778 is 8779272.

2729778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729777) 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 15 ways as a sum of consecutive naturals, for example, 18003 + ... + 18153.

It is an arithmetic number, because the mean of its divisors is an integer number (180576).

2^2729778 is an apocalyptic number.

2729778 is an abundant number, since it is smaller than the sum of its proper divisors (3048654).

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

2729778 is a wasteful number, since it uses less digits than its factorization.

2729778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its digits is 98784, while the sum is 42.

The square root of 2729778 is about 1652.2039825639. The cubic root of 2729778 is about 139.7577101768.

The spelling of 2729778 in words is "two million, seven hundred twenty-nine thousand, seven hundred seventy-eight".