38806521 has 16 divisors (see below), whose sum is σ = 55835136. Its totient is φ = 23832576.

The previous prime is 38806489. The next prime is 38806549. The reversal of 38806521 is 12560883.

It is a happy number.

It is not a de Polignac number, because 38806521 - 2⁵ = 38806489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38806571) 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, 33081 + ... + 34233.

It is an arithmetic number, because the mean of its divisors is an integer number (3489696).

Almost surely, 2^38806521 is an apocalyptic number.

It is an amenable number.

38806521 is a deficient number, since it is larger than the sum of its proper divisors (17028615).

38806521 is a wasteful number, since it uses less digits than its factorization.

38806521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 38806521 is about 6229.4880206964. The cubic root of 38806521 is about 338.5594210395.

It can be divided in two parts, 3880 and 6521, that added together give a palindrome (10401).

The spelling of 38806521 in words is "thirty-eight million, eight hundred six thousand, five hundred twenty-one".