38681381 has 8 divisors (see below), whose sum is σ = 40232544. Its totient is φ = 37159920.

The previous prime is 38681371. The next prime is 38681399. The reversal of 38681381 is 18318683.

38681381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38681381 - 2¹⁸ = 38419237 is a prime.

It is a super-2 number, since 2×38681381² = 2992498472134322, 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 (38681351) 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 7 ways as a sum of consecutive naturals, for example, 4751 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (5029068).

Almost surely, 2^38681381 is an apocalyptic number.

It is an amenable number.

38681381 is a deficient number, since it is larger than the sum of its proper divisors (1551163).

38681381 is a wasteful number, since it uses less digits than its factorization.

38681381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14851.

The product of its digits is 27648, while the sum is 38.

The square root of 38681381 is about 6219.4357461107. The cubic root of 38681381 is about 338.1951098577.

The spelling of 38681381 in words is "thirty-eight million, six hundred eighty-one thousand, three hundred eighty-one".