2390305 has 8 divisors (see below), whose sum is σ = 2884392. Its totient is φ = 1901568.

The previous prime is 2390299. The next prime is 2390309. The reversal of 2390305 is 5030932.

It can be written as a sum of positive squares in 4 ways, for example, as 82944 + 2307361 = 288^2 + 1519^2 .

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 2390305 - 2¹¹ = 2388257 is a prime.

It is a Duffinian number.

2390305 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2390309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274 + ... + 2203.

It is an arithmetic number, because the mean of its divisors is an integer number (360549).

2^2390305 is an apocalyptic number.

It is an amenable number.

2390305 is a deficient number, since it is larger than the sum of its proper divisors (494087).

2390305 is a wasteful number, since it uses less digits than its factorization.

2390305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 2390305 is about 1546.0611242768. The cubic root of 2390305 is about 133.7060647029.

The spelling of 2390305 in words is "two million, three hundred ninety thousand, three hundred five".