38382381 has 6 divisors (see below), whose sum is σ = 55441230. Its totient is φ = 25588248.

The previous prime is 38382373. The next prime is 38382403. The reversal of 38382381 is 18328383.

38382381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 38378025 + 4356 = 6195^2 + 66^2 .

It is not a de Polignac number, because 38382381 - 2³ = 38382373 is a prime.

It is a super-2 number, since 2×38382381² = 2946414342458322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38382301) 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 5 ways as a sum of consecutive naturals, for example, 2132346 + ... + 2132363.

It is an arithmetic number, because the mean of its divisors is an integer number (9240205).

Almost surely, 2^38382381 is an apocalyptic number.

It is an amenable number.

38382381 is a deficient number, since it is larger than the sum of its proper divisors (17058849).

38382381 is a wasteful number, since it uses less digits than its factorization.

38382381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264715 (or 4264712 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 38382381 is about 6195.3515638743. The cubic root of 38382381 is about 337.3214594766.

The spelling of 38382381 in words is "thirty-eight million, three hundred eighty-two thousand, three hundred eighty-one".