2750805 has 12 divisors (see below), whose sum is σ = 4768140. Its totient is φ = 1467072.

The previous prime is 2750791. The next prime is 2750809. The reversal of 2750805 is 5080572.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 509796 + 2241009 = 714^2 + 1497^2 .

It is not a de Polignac number, because 2750805 - 2⁴ = 2750789 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2750809) 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 11 ways as a sum of consecutive naturals, for example, 30520 + ... + 30609.

It is an arithmetic number, because the mean of its divisors is an integer number (397345).

2^2750805 is an apocalyptic number.

It is an amenable number.

2750805 is a deficient number, since it is larger than the sum of its proper divisors (2017335).

2750805 is a wasteful number, since it uses less digits than its factorization.

2750805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61140 (or 61137 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 2750805 is about 1658.5550940502. Note that the first 3 decimals coincide. The cubic root of 2750805 is about 140.1156357546.

The spelling of 2750805 in words is "two million, seven hundred fifty thousand, eight hundred five".