2305290 has 64 divisors (see below), whose sum is σ = 6241536. Its totient is φ = 540672.

The previous prime is 2305279. The next prime is 2305291. The reversal of 2305290 is 925032.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2305291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8842 + ... + 9098.

It is an arithmetic number, because the mean of its divisors is an integer number (97524).

2^2305290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2305290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3120768).

2305290 is an abundant number, since it is smaller than the sum of its proper divisors (3936246).

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

2305290 is a wasteful number, since it uses less digits than its factorization.

2305290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 2305290 is about 1518.3181484788. The cubic root of 2305290 is about 132.1017351609.

The spelling of 2305290 in words is "two million, three hundred five thousand, two hundred ninety".