38865987 has 20 divisors (see below), whose sum is σ = 58244560. Its totient is φ = 25827984.

The previous prime is 38865979. The next prime is 38866019. The reversal of 38865987 is 78956883.

It is a happy number.

It is not a de Polignac number, because 38865987 - 2³ = 38865979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38865977) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35013 + ... + 36105.

It is an arithmetic number, because the mean of its divisors is an integer number (2912228).

Almost surely, 2^38865987 is an apocalyptic number.

38865987 is a deficient number, since it is larger than the sum of its proper divisors (19378573).

38865987 is a wasteful number, since it uses less digits than its factorization.

38865987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1535 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 38865987 is about 6234.2591380211. The cubic root of 38865987 is about 338.7322656983.

The spelling of 38865987 in words is "thirty-eight million, eight hundred sixty-five thousand, nine hundred eighty-seven".