38347981 has 8 divisors (see below), whose sum is σ = 44121600. Its totient is φ = 32648208.

The previous prime is 38347979. The next prime is 38347993. The reversal of 38347981 is 18974383.

It is a happy number.

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 38347981 - 2¹ = 38347979 is a prime.

It is a super-3 number, since 3×38347981³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38347901) 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 7 ways as a sum of consecutive naturals, for example, 17341 + ... + 19426.

It is an arithmetic number, because the mean of its divisors is an integer number (5515200).

Almost surely, 2^38347981 is an apocalyptic number.

It is an amenable number.

38347981 is a deficient number, since it is larger than the sum of its proper divisors (5773619).

38347981 is a wasteful number, since it uses less digits than its factorization.

38347981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36923.

The product of its digits is 145152, while the sum is 43.

The square root of 38347981 is about 6192.5746664857. The cubic root of 38347981 is about 337.2206551816.

The spelling of 38347981 in words is "thirty-eight million, three hundred forty-seven thousand, nine hundred eighty-one".