2303640 has 112 divisors (see below), whose sum is σ = 7869600. Its totient is φ = 606528.

The previous prime is 2303629. The next prime is 2303663. The reversal of 2303640 is 463032.

2303640 is a `hidden beast` number, since 23 + 0 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 29121 + ... + 29199.

2^2303640 is an apocalyptic number.

2303640 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 2303640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3934800).

2303640 is an abundant number, since it is smaller than the sum of its proper divisors (5565960).

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

2303640 is an equidigital number, since it uses as much as digits as its factorization.

2303640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 2303640 is about 1517.7746868360. The cubic root of 2303640 is about 132.0702105824.

Adding to 2303640 its reverse (463032), we get a palindrome (2766672).

The spelling of 2303640 in words is "two million, three hundred three thousand, six hundred forty".