7091971240 has 32 divisors (see below), whose sum is σ = 16011422280. Its totient is φ = 2827101952.

The previous prime is 7091971193. The next prime is 7091971253. The reversal of 7091971240 is 421791907.

It can be written as a sum of positive squares in 4 ways, for example, as 6945222244 + 146748996 = 83338^2 + 12114^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 7091971193 and 7091971202.

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 7 ways as a sum of consecutive naturals, for example, 290839 + ... + 314278.

Almost surely, 2^7091971240 is an apocalyptic number.

It is an amenable number.

7091971240 is an abundant number, since it is smaller than the sum of its proper divisors (8919451040).

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

7091971240 is a wasteful number, since it uses less digits than its factorization.

7091971240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605421 (or 605417 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 7091971240 is about 84213.8423301063. The cubic root of 7091971240 is about 1921.2725974387.

The spelling of 7091971240 in words is "seven billion, ninety-one million, nine hundred seventy-one thousand, two hundred forty".