38685021 has 8 divisors (see below), whose sum is σ = 51612000. Its totient is φ = 25774032.

The previous prime is 38685001. The next prime is 38685029. The reversal of 38685021 is 12058683.

It is a happy number.

38685021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 38685021 - 2¹³ = 38676829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38685029) 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 7 ways as a sum of consecutive naturals, for example, 3855 + ... + 9603.

It is an arithmetic number, because the mean of its divisors is an integer number (6451500).

Almost surely, 2^38685021 is an apocalyptic number.

It is an amenable number.

38685021 is a deficient number, since it is larger than the sum of its proper divisors (12926979).

38685021 is a wasteful number, since it uses less digits than its factorization.

38685021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995.

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

The square root of 38685021 is about 6219.7283702747. The cubic root of 38685021 is about 338.2057178174.

The spelling of 38685021 in words is "thirty-eight million, six hundred eighty-five thousand, twenty-one".