38816281 has 8 divisors (see below), whose sum is σ = 45267200. Its totient is φ = 33270804.

The previous prime is 38816273. The next prime is 38816303. The reversal of 38816281 is 18261883.

It is not a de Polignac number, because 38816281 - 2³ = 38816273 is a prime.

It is a super-2 number, since 2×38816281² = 3013407341341922, which contains 22 as substring.

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 38816281.

It is not an unprimeable number, because it can be changed into a prime (38816231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56241 + ... + 56926.

It is an arithmetic number, because the mean of its divisors is an integer number (5658400).

Almost surely, 2^38816281 is an apocalyptic number.

It is an amenable number.

38816281 is a deficient number, since it is larger than the sum of its proper divisors (6450919).

38816281 is an equidigital number, since it uses as much as digits as its factorization.

38816281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113188 (or 113174 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 38816281 is about 6230.2713424056. The cubic root of 38816281 is about 338.5878016903.

The spelling of 38816281 in words is "thirty-eight million, eight hundred sixteen thousand, two hundred eighty-one".