7991208 has 24 divisors (see below), whose sum is σ = 21643050. Its totient is φ = 2663712.

The previous prime is 7991177. The next prime is 7991209. The reversal of 7991208 is 8021997.

It is a happy number.

7991208 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 only one way, i.e., 4235364 + 3755844 = 2058^2 + 1938^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7991209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55423 + ... + 55566.

Almost surely, 2^7991208 is an apocalyptic number.

It is an amenable number.

7991208 is an abundant number, since it is smaller than the sum of its proper divisors (13651842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7991208 is a wasteful number, since it uses less digits than its factorization.

7991208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111001 (or 110994 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 7991208 is about 2826.8724767842. The cubic root of 7991208 is about 199.9267064769.

The spelling of 7991208 in words is "seven million, nine hundred ninety-one thousand, two hundred eight".