2790605 has 4 divisors (see below), whose sum is σ = 3348732. Its totient is φ = 2232480.

The previous prime is 2790569. The next prime is 2790629. The reversal of 2790605 is 5060972.

2790605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1297321 + 1493284 = 1139^2 + 1222^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2790605 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279056 + ... + 279065.

It is an arithmetic number, because the mean of its divisors is an integer number (837183).

2^2790605 is an apocalyptic number.

It is an amenable number.

2790605 is a deficient number, since it is larger than the sum of its proper divisors (558127).

2790605 is an equidigital number, since it uses as much as digits as its factorization.

2790605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558126.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 2790605 is about 1670.5104010451. The cubic root of 2790605 is about 140.7881566366.

The spelling of 2790605 in words is "two million, seven hundred ninety thousand, six hundred five".