8312047840 has 24 divisors (see below), whose sum is σ = 19637213400. Its totient is φ = 3324819072.

The previous prime is 8312047789. The next prime is 8312047841. The reversal of 8312047840 is 487402138.

It is a self number, because there is not a number n which added to its sum of digits gives 8312047840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8312047841) 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, 25974990 + ... + 25975309.

It is an arithmetic number, because the mean of its divisors is an integer number (818217225).

Almost surely, 2^8312047840 is an apocalyptic number.

8312047840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8312047840 is an abundant number, since it is smaller than the sum of its proper divisors (11325165560).

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

8312047840 is a wasteful number, since it uses less digits than its factorization.

8312047840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51950314 (or 51950306 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8312047840 is about 91170.4329264702. The cubic root of 8312047840 is about 2025.6730244740.

Adding to 8312047840 its reverse (487402138), we get a palindrome (8799449978).

The spelling of 8312047840 in words is "eight billion, three hundred twelve million, forty-seven thousand, eight hundred forty".