38889121 has 4 divisors (see below), whose sum is σ = 39622932. Its totient is φ = 38155312.

The previous prime is 38889101. The next prime is 38889131. The reversal of 38889121 is 12198883.

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 19184400 + 19704721 = 4380^2 + 4439^2 .

It is a cyclic number.

It is not a de Polignac number, because 38889121 - 2¹⁵ = 38856353 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38889101) 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, 366826 + ... + 366931.

It is an arithmetic number, because the mean of its divisors is an integer number (9905733).

Almost surely, 2^38889121 is an apocalyptic number.

It is an amenable number.

38889121 is a deficient number, since it is larger than the sum of its proper divisors (733811).

38889121 is an equidigital number, since it uses as much as digits as its factorization.

38889121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733810.

The product of its digits is 27648, while the sum is 40.

The square root of 38889121 is about 6236.1142548866. The cubic root of 38889121 is about 338.7994596519.

The spelling of 38889121 in words is "thirty-eight million, eight hundred eighty-nine thousand, one hundred twenty-one".