3688531 has 8 divisors (see below), whose sum is σ = 4598784. Its totient is φ = 2874120.

The previous prime is 3688519. The next prime is 3688537. The reversal of 3688531 is 1358863.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3688531 - 2¹¹ = 3686483 is a prime.

It is a super-2 number, since 2×3688531² = 27210521875922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3688537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23875 + ... + 24028.

It is an arithmetic number, because the mean of its divisors is an integer number (574848).

Almost surely, 2^3688531 is an apocalyptic number.

3688531 is a deficient number, since it is larger than the sum of its proper divisors (910253).

3688531 is a wasteful number, since it uses less digits than its factorization.

3688531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47921.

The product of its digits is 17280, while the sum is 34.

The square root of 3688531 is about 1920.5548677400. The cubic root of 3688531 is about 154.5080622654.

The spelling of 3688531 in words is "three million, six hundred eighty-eight thousand, five hundred thirty-one".