7991822 has 8 divisors (see below), whose sum is σ = 12051072. Its totient is φ = 3974800.

The previous prime is 7991803. The next prime is 7991839. The reversal of 7991822 is 2281997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10079 + ... + 10842.

It is an arithmetic number, because the mean of its divisors is an integer number (1506384).

Almost surely, 2^7991822 is an apocalyptic number.

7991822 is a deficient number, since it is larger than the sum of its proper divisors (4059250).

7991822 is a wasteful number, since it uses less digits than its factorization.

7991822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21114.

The product of its digits is 18144, while the sum is 38.

The square root of 7991822 is about 2826.9810752815. The cubic root of 7991822 is about 199.9318267647.

The spelling of 7991822 in words is "seven million, nine hundred ninety-one thousand, eight hundred twenty-two".