7997776 has 20 divisors (see below), whose sum is σ = 15554932. Its totient is φ = 3983616.

The previous prime is 7997749. The next prime is 7997777. The reversal of 7997776 is 6777997.

It can be written as a sum of positive squares in 2 ways, for example, as 577600 + 7420176 = 760^2 + 2724^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4210 + ... + 5806.

Almost surely, 2^7997776 is an apocalyptic number.

It is an amenable number.

7997776 is a deficient number, since it is larger than the sum of its proper divisors (7557156).

7997776 is a wasteful number, since it uses less digits than its factorization.

7997776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1912 counting only the distinct ones).

The product of its digits is 1166886, while the sum is 52.

The square root of 7997776 is about 2828.0339460480. The cubic root of 7997776 is about 199.9814649490.

The spelling of 7997776 in words is "seven million, nine hundred ninety-seven thousand, seven hundred seventy-six".