38448921 has 8 divisors (see below), whose sum is σ = 58588864. Its totient is φ = 21970800.

The previous prime is 38448919. The next prime is 38448931. The reversal of 38448921 is 12984483.

38448921 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 38448921 - 2¹ = 38448919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38448921.

It is not an unprimeable number, because it can be changed into a prime (38448901) 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, 915430 + ... + 915471.

It is an arithmetic number, because the mean of its divisors is an integer number (7323608).

Almost surely, 2^38448921 is an apocalyptic number.

It is an amenable number.

38448921 is a deficient number, since it is larger than the sum of its proper divisors (20139943).

38448921 is a wasteful number, since it uses less digits than its factorization.

38448921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830911.

The product of its digits is 55296, while the sum is 39.

The square root of 38448921 is about 6200.7193937478. The cubic root of 38448921 is about 337.5162746610.

The spelling of 38448921 in words is "thirty-eight million, four hundred forty-eight thousand, nine hundred twenty-one".