2312103440 has 20 divisors (see below), whose sum is σ = 5375640684. Its totient is φ = 924841344.

The previous prime is 2312103439. The next prime is 2312103449. The reversal of 2312103440 is 443012132.

It can be written as a sum of positive squares in 2 ways, for example, as 1202147584 + 1109955856 = 34672^2 + 33316^2 .

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 (20).

It is not an unprimeable number, because it can be changed into a prime (2312103449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14450567 + ... + 14450726.

Almost surely, 2^2312103440 is an apocalyptic number.

2312103440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2312103440 is an abundant number, since it is smaller than the sum of its proper divisors (3063537244).

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

2312103440 is a wasteful number, since it uses less digits than its factorization.

2312103440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28901306 (or 28901300 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2312103440 is about 48084.3367428521. The cubic root of 2312103440 is about 1322.3175234789.

Adding to 2312103440 its reverse (443012132), we get a palindrome (2755115572).

The spelling of 2312103440 in words is "two billion, three hundred twelve million, one hundred three thousand, four hundred forty".