7972660340 has 36 divisors (see below), whose sum is σ = 17785390476. Its totient is φ = 3001469952.

The previous prime is 7972660303. The next prime is 7972660369. The reversal of 7972660340 is 430662797.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1915462756 + 6057197584 = 43766^2 + 77828^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7972660291 and 7972660300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683897 + ... + 695456.

Almost surely, 2^7972660340 is an apocalyptic number.

It is an amenable number.

7972660340 is an abundant number, since it is smaller than the sum of its proper divisors (9812730136).

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

7972660340 is a wasteful number, since it uses less digits than its factorization.

7972660340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379396 (or 1379377 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 7972660340 is about 89289.7549554259. The cubic root of 7972660340 is about 1997.7190947244.

The spelling of 7972660340 in words is "seven billion, nine hundred seventy-two million, six hundred sixty thousand, three hundred forty".