2331403440 has 80 divisors (see below), whose sum is σ = 7247750400. Its totient is φ = 619952896.

The previous prime is 2331403433. The next prime is 2331403483. The reversal of 2331403440 is 443041332.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2331403440.

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, 72631 + ... + 99689.

It is an arithmetic number, because the mean of its divisors is an integer number (90596880).

Almost surely, 2^2331403440 is an apocalyptic number.

2331403440 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 2331403440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3623875200).

2331403440 is an abundant number, since it is smaller than the sum of its proper divisors (4916346960).

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

2331403440 is a wasteful number, since it uses less digits than its factorization.

2331403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27434 (or 27428 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 2331403440 is about 48284.6087278338. The cubic root of 2331403440 is about 1325.9866276756.

Adding to 2331403440 its reverse (443041332), we get a palindrome (2774444772).

The spelling of 2331403440 in words is "two billion, three hundred thirty-one million, four hundred three thousand, four hundred forty".