38828191 has 4 divisors (see below), whose sum is σ = 40871800. Its totient is φ = 36784584.

The previous prime is 38828177. The next prime is 38828197. The reversal of 38828191 is 19182883.

38828191 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 is a cyclic number.

It is not a de Polignac number, because 38828191 - 2¹¹ = 38826143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38828197) 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, 1021776 + ... + 1021813.

It is an arithmetic number, because the mean of its divisors is an integer number (10217950).

Almost surely, 2^38828191 is an apocalyptic number.

38828191 is a deficient number, since it is larger than the sum of its proper divisors (2043609).

38828191 is a wasteful number, since it uses less digits than its factorization.

38828191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043608.

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

The square root of 38828191 is about 6231.2270862166. The cubic root of 38828191 is about 338.6224277823.

The spelling of 38828191 in words is "thirty-eight million, eight hundred twenty-eight thousand, one hundred ninety-one".