38987861 has 8 divisors (see below), whose sum is σ = 43999200. Its totient is φ = 34221040.

The previous prime is 38987833. The next prime is 38987887. The reversal of 38987861 is 16878983.

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 38987861 - 2⁶ = 38987797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38987891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60791 + ... + 61428.

It is an arithmetic number, because the mean of its divisors is an integer number (5499900).

Almost surely, 2^38987861 is an apocalyptic number.

It is an amenable number.

38987861 is a deficient number, since it is larger than the sum of its proper divisors (5011339).

38987861 is a wasteful number, since it uses less digits than its factorization.

38987861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122259.

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

The square root of 38987861 is about 6244.0260249297. The cubic root of 38987861 is about 339.0859561070.

The spelling of 38987861 in words is "thirty-eight million, nine hundred eighty-seven thousand, eight hundred sixty-one".