2303440 has 20 divisors (see below), whose sum is σ = 5355684. Its totient is φ = 921344.

The previous prime is 2303437. The next prime is 2303461. The reversal of 2303440 is 443032.

It can be written as a sum of positive squares in 2 ways, for example, as 725904 + 1577536 = 852^2 + 1256^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an Ulam number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14317 + ... + 14476.

2^2303440 is an apocalyptic number.

2303440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2303440 is an abundant number, since it is smaller than the sum of its proper divisors (3052244).

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

2303440 is a wasteful number, since it uses less digits than its factorization.

2303440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28806 (or 28800 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 2303440 is about 1517.7087994737. The cubic root of 2303440 is about 132.0663883986.

Adding to 2303440 its reverse (443032), we get a palindrome (2746472).

The spelling of 2303440 in words is "two million, three hundred three thousand, four hundred forty".