38216381 has 8 divisors (see below), whose sum is σ = 44077440. Its totient is φ = 32455728.

The previous prime is 38216377. The next prime is 38216383. The reversal of 38216381 is 18361283.

It is a happy number.

38216381 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 38216381 - 2² = 38216377 is a prime.

It is a super-2 number, since 2×38216381² = 2920983553474322, 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 (38216383) 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, 24281 + ... + 25806.

It is an arithmetic number, because the mean of its divisors is an integer number (5509680).

Almost surely, 2^38216381 is an apocalyptic number.

It is an amenable number.

38216381 is a deficient number, since it is larger than the sum of its proper divisors (5861059).

38216381 is a wasteful number, since it uses less digits than its factorization.

38216381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50203.

The product of its digits is 6912, while the sum is 32.

The square root of 38216381 is about 6181.9399058871. The cubic root of 38216381 is about 336.8344627511.

The spelling of 38216381 in words is "thirty-eight million, two hundred sixteen thousand, three hundred eighty-one".