38681987 has 8 divisors (see below), whose sum is σ = 41829696. Its totient is φ = 35631232.

The previous prime is 38681977. The next prime is 38681989. The reversal of 38681987 is 78918683.

It is a happy number.

38681987 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 38681987 - 2¹⁴ = 38665603 is a prime.

It is a super-2 number, since 2×38681987² = 2992592236536338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38681989) 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, 23408 + ... + 25005.

It is an arithmetic number, because the mean of its divisors is an integer number (5228712).

Almost surely, 2^38681987 is an apocalyptic number.

38681987 is a deficient number, since it is larger than the sum of its proper divisors (3147709).

38681987 is a wasteful number, since it uses less digits than its factorization.

38681987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48477.

The product of its digits is 580608, while the sum is 50.

The square root of 38681987 is about 6219.4844641658. The cubic root of 38681987 is about 338.1968759543.

The spelling of 38681987 in words is "thirty-eight million, six hundred eighty-one thousand, nine hundred eighty-seven".