7890031312 has 20 divisors (see below), whose sum is σ = 15289725636. Its totient is φ = 3944295680.

The previous prime is 7890031283. The next prime is 7890031319. The reversal of 7890031312 is 2131300987.

It can be written as a sum of positive squares in 2 ways, for example, as 5213417616 + 2676613696 = 72204^2 + 51736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7890031319) 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, 51708 + ... + 135844.

Almost surely, 2^7890031312 is an apocalyptic number.

It is an amenable number.

7890031312 is a deficient number, since it is larger than the sum of its proper divisors (7399694324).

7890031312 is a wasteful number, since it uses less digits than its factorization.

7890031312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90006 (or 90000 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 7890031312 is about 88825.8482199861. The cubic root of 7890031312 is about 1990.7936290593.

The spelling of 7890031312 in words is "seven billion, eight hundred ninety million, thirty-one thousand, three hundred twelve".