2730845 has 8 divisors (see below), whose sum is σ = 3529176. Its totient is φ = 2016576.

The previous prime is 2730823. The next prime is 2730869. The reversal of 2730845 is 5480372.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 177241 + 2553604 = 421^2 + 1598^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2730845 - 2⁶ = 2730781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 20942 + ... + 21071.

It is an arithmetic number, because the mean of its divisors is an integer number (441147).

2^2730845 is an apocalyptic number.

It is an amenable number.

2730845 is a deficient number, since it is larger than the sum of its proper divisors (798331).

2730845 is a wasteful number, since it uses less digits than its factorization.

2730845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42031.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 2730845 is about 1652.5268530345. The cubic root of 2730845 is about 139.7759170360.

The spelling of 2730845 in words is "two million, seven hundred thirty thousand, eight hundred forty-five".