7991446 has 8 divisors (see below), whose sum is σ = 12213504. Its totient is φ = 3920280.

The previous prime is 7991441. The next prime is 7991447. The reversal of 7991446 is 6441997.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 7991399 and 7991408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991441) by changing a digit.

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, 37590 + ... + 37801.

It is an arithmetic number, because the mean of its divisors is an integer number (1526688).

Almost surely, 2^7991446 is an apocalyptic number.

7991446 is a deficient number, since it is larger than the sum of its proper divisors (4222058).

7991446 is a wasteful number, since it uses less digits than its factorization.

7991446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75446.

The product of its digits is 54432, while the sum is 40.

The square root of 7991446 is about 2826.9145724624. The cubic root of 7991446 is about 199.9286912450.

The spelling of 7991446 in words is "seven million, nine hundred ninety-one thousand, four hundred forty-six".