7991828258 has 16 divisors (see below), whose sum is σ = 12193055160. Its totient is φ = 3927571200.

The previous prime is 7991828237. The next prime is 7991828261. The reversal of 7991828258 is 8528281997.

It can be written as a sum of positive squares in 4 ways, for example, as 3308205289 + 4683622969 = 57517^2 + 68437^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7991828197 and 7991828206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151418 + ... + 197258.

Almost surely, 2^7991828258 is an apocalyptic number.

7991828258 is a deficient number, since it is larger than the sum of its proper divisors (4201226902).

7991828258 is a wasteful number, since it uses less digits than its factorization.

7991828258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47333.

The product of its digits is 5806080, while the sum is 59.

The square root of 7991828258 is about 89397.0260019873. The cubic root of 7991828258 is about 1999.3187895025.

The spelling of 7991828258 in words is "seven billion, nine hundred ninety-one million, eight hundred twenty-eight thousand, two hundred fifty-eight".