38689531 has 4 divisors (see below), whose sum is σ = 39735232. Its totient is φ = 37643832.

The previous prime is 38689499. The next prime is 38689543. The reversal of 38689531 is 13598683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13598683 = 7 ⋅1942669.

It is a cyclic number.

It is not a de Polignac number, because 38689531 - 2⁵ = 38689499 is a prime.

It is a super-3 number, since 3×38689531³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38689561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522795 + ... + 522868.

It is an arithmetic number, because the mean of its divisors is an integer number (9933808).

Almost surely, 2^38689531 is an apocalyptic number.

38689531 is a deficient number, since it is larger than the sum of its proper divisors (1045701).

38689531 is a wasteful number, since it uses less digits than its factorization.

38689531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045700.

The product of its digits is 155520, while the sum is 43.

The square root of 38689531 is about 6220.0909157343. The cubic root of 38689531 is about 338.2188602730.

The spelling of 38689531 in words is "thirty-eight million, six hundred eighty-nine thousand, five hundred thirty-one".