7920844 has 12 divisors (see below), whose sum is σ = 14676984. Its totient is φ = 3727424.

The previous prime is 7920833. The next prime is 7920883. The reversal of 7920844 is 4480297.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an Ulam 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, 58174 + ... + 58309.

It is an arithmetic number, because the mean of its divisors is an integer number (1223082).

Almost surely, 2^7920844 is an apocalyptic number.

It is an amenable number.

7920844 is a deficient number, since it is larger than the sum of its proper divisors (6756140).

7920844 is a wasteful number, since it uses less digits than its factorization.

7920844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116504 (or 116502 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 7920844 is about 2814.3994030699. The cubic root of 7920844 is about 199.3381790475.

The spelling of 7920844 in words is "seven million, nine hundred twenty thousand, eight hundred forty-four".