2320440 has 64 divisors (see below), whose sum is σ = 7097760. Its totient is φ = 606720.

The previous prime is 2320427. The next prime is 2320471. The reversal of 2320440 is 440232.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7162 + ... + 7478.

2^2320440 is an apocalyptic number.

2320440 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 2320440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3548880).

2320440 is an abundant number, since it is smaller than the sum of its proper divisors (4777320).

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

2320440 is a wasteful number, since it uses less digits than its factorization.

2320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 2320440 is about 1523.2990514013. The cubic root of 2320440 is about 132.3904874160.

Adding to 2320440 its reverse (440232), we get a palindrome (2760672).

The spelling of 2320440 in words is "two million, three hundred twenty thousand, four hundred forty".