7991650 has 12 divisors (see below), whose sum is σ = 14864562. Its totient is φ = 3196640.

The previous prime is 7991639. The next prime is 7991653. The reversal of 7991650 is 561997.

It can be written as a sum of positive squares in 3 ways, for example, as 3164841 + 4826809 = 1779^2 + 2197^2 .

It is not an unprimeable number, because it can be changed into a prime (7991653) 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 5 ways as a sum of consecutive naturals, for example, 79867 + ... + 79966.

Almost surely, 2^7991650 is an apocalyptic number.

7991650 is a deficient number, since it is larger than the sum of its proper divisors (6872912).

7991650 is a wasteful number, since it uses less digits than its factorization.

7991650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159845 (or 159840 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 7991650 is about 2826.9506539733. The cubic root of 7991650 is about 199.9303924434.

The spelling of 7991650 in words is "seven million, nine hundred ninety-one thousand, six hundred fifty".