38610021 has 4 divisors (see below), whose sum is σ = 51480032. Its totient is φ = 25740012.

The previous prime is 38610007. The next prime is 38610029. The reversal of 38610021 is 12001683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12001683 = 3 ⋅4000561.

It is not a de Polignac number, because 38610021 - 2⁹ = 38609509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38610021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38610029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6435001 + ... + 6435006.

It is an arithmetic number, because the mean of its divisors is an integer number (12870008).

Almost surely, 2^38610021 is an apocalyptic number.

It is an amenable number.

38610021 is a deficient number, since it is larger than the sum of its proper divisors (12870011).

38610021 is a wasteful number, since it uses less digits than its factorization.

38610021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12870010.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 38610021 is about 6213.6962429781. The cubic root of 38610021 is about 337.9870126775.

The spelling of 38610021 in words is "thirty-eight million, six hundred ten thousand, twenty-one".