38828181 has 16 divisors (see below), whose sum is σ = 59337344. Its totient is φ = 22123584.

The previous prime is 38828177. The next prime is 38828197. The reversal of 38828181 is 18182883.

It is not a de Polignac number, because 38828181 - 2² = 38828177 is a prime.

It is a super-2 number, since 2×38828181² = 3015255279537522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38828131) 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 15 ways as a sum of consecutive naturals, for example, 5355 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (3708584).

Almost surely, 2^38828181 is an apocalyptic number.

It is an amenable number.

38828181 is a deficient number, since it is larger than the sum of its proper divisors (20509163).

38828181 is a wasteful number, since it uses less digits than its factorization.

38828181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340.

The product of its digits is 24576, while the sum is 39.

The square root of 38828181 is about 6231.2262838064. The cubic root of 38828181 is about 338.6223987122.

The spelling of 38828181 in words is "thirty-eight million, eight hundred twenty-eight thousand, one hundred eighty-one".