7688642 has 16 divisors (see below), whose sum is σ = 12538680. Its totient is φ = 3514752.

The previous prime is 7688627. The next prime is 7688663. The reversal of 7688642 is 2468867.

It can be written as a sum of positive squares in 4 ways, for example, as 7513081 + 175561 = 2741^2 + 419^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7688642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1478 + ... + 4190.

Almost surely, 2^7688642 is an apocalyptic number.

7688642 is a deficient number, since it is larger than the sum of its proper divisors (4850038).

7688642 is a wasteful number, since it uses less digits than its factorization.

7688642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837.

The product of its digits is 129024, while the sum is 41.

The square root of 7688642 is about 2772.8400602992. The cubic root of 7688642 is about 197.3709416947.

The spelling of 7688642 in words is "seven million, six hundred eighty-eight thousand, six hundred forty-two".