38039521 has 4 divisors (see below), whose sum is σ = 40965652. Its totient is φ = 35113392.

The previous prime is 38039471. The next prime is 38039537. The reversal of 38039521 is 12593083.

It is a happy number.

38039521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20070400 + 17969121 = 4480^2 + 4239^2 .

It is a cyclic number.

It is not a de Polignac number, because 38039521 - 2¹⁵ = 38006753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38039581) 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 3 ways as a sum of consecutive naturals, for example, 1463046 + ... + 1463071.

It is an arithmetic number, because the mean of its divisors is an integer number (10241413).

Almost surely, 2^38039521 is an apocalyptic number.

It is an amenable number.

38039521 is a deficient number, since it is larger than the sum of its proper divisors (2926131).

38039521 is a wasteful number, since it uses less digits than its factorization.

38039521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926130.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 38039521 is about 6167.6187463234. The cubic root of 38039521 is about 336.3140517276.

The spelling of 38039521 in words is "thirty-eight million, thirty-nine thousand, five hundred twenty-one".