35685681 has 16 divisors (see below), whose sum is σ = 49336320. Its totient is φ = 22919760.

The previous prime is 35685653. The next prime is 35685701. The reversal of 35685681 is 18658653.

It is not a de Polignac number, because 35685681 - 2¹⁰ = 35684657 is a prime.

It is a super-3 number, since 3×35685681³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (35685281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23730 + ... + 25188.

It is an arithmetic number, because the mean of its divisors is an integer number (3083520).

Almost surely, 2^35685681 is an apocalyptic number.

35685681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

35685681 is a deficient number, since it is larger than the sum of its proper divisors (13650639).

35685681 is a wasteful number, since it uses less digits than its factorization.

35685681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its digits is 172800, while the sum is 42.

The square root of 35685681 is about 5973.7493251726. The cubic root of 35685681 is about 329.2289343791.

The spelling of 35685681 in words is "thirty-five million, six hundred eighty-five thousand, six hundred eighty-one".