7991828 has 12 divisors (see below), whose sum is σ = 15061620. Its totient is φ = 3688512.

The previous prime is 7991803. The next prime is 7991839. The reversal of 7991828 is 8281997.

7991828 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5438224 + 2553604 = 2332^2 + 1598^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76793 + ... + 76896.

It is an arithmetic number, because the mean of its divisors is an integer number (1255135).

Almost surely, 2^7991828 is an apocalyptic number.

It is an amenable number.

7991828 is a deficient number, since it is larger than the sum of its proper divisors (7069792).

7991828 is a wasteful number, since it uses less digits than its factorization.

7991828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153706 (or 153704 counting only the distinct ones).

The product of its digits is 72576, while the sum is 44.

The square root of 7991828 is about 2826.9821364841. The cubic root of 7991828 is about 199.9318767988.

The spelling of 7991828 in words is "seven million, nine hundred ninety-one thousand, eight hundred twenty-eight".