32688681 has 16 divisors (see below), whose sum is σ = 45702144. Its totient is φ = 20743184.

The previous prime is 32688679. The next prime is 32688701. The reversal of 32688681 is 18688623.

It is a cyclic number.

It is not a de Polignac number, because 32688681 - 2¹ = 32688679 is a prime.

It is a super-2 number, since 2×32688681² = 2137099731039522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (32688661) 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 15 ways as a sum of consecutive naturals, for example, 14620 + ... + 16706.

It is an arithmetic number, because the mean of its divisors is an integer number (2856384).

Almost surely, 2^32688681 is an apocalyptic number.

It is an amenable number.

32688681 is a deficient number, since it is larger than the sum of its proper divisors (13013463).

32688681 is a wasteful number, since it uses less digits than its factorization.

32688681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340.

The product of its digits is 110592, while the sum is 42.

The square root of 32688681 is about 5717.4015951304. The cubic root of 32688681 is about 319.7415915147.

The spelling of 32688681 in words is "thirty-two million, six hundred eighty-eight thousand, six hundred eighty-one".