2306440 has 48 divisors (see below), whose sum is σ = 5474700. Its totient is φ = 874368.

The previous prime is 2306413. The next prime is 2306449. The reversal of 2306440 is 446032.

It can be written as a sum of positive squares in 2 ways, for example, as 2304324 + 2116 = 1518^2 + 46^2 .

It is not an unprimeable number, because it can be changed into a prime (2306449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21106 + ... + 21214.

2^2306440 is an apocalyptic number.

2306440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2306440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2737350).

2306440 is an abundant number, since it is smaller than the sum of its proper divisors (3168260).

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

2306440 is a wasteful number, since it uses less digits than its factorization.

2306440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2306440 is about 1518.6968097682. The cubic root of 2306440 is about 132.1236979423.

It can be divided in two parts, 23064 and 40, that added together give a square (23104 = 152²).

The spelling of 2306440 in words is "two million, three hundred six thousand, four hundred forty".