38555865 has 16 divisors (see below), whose sum is σ = 68544000. Its totient is φ = 20563056.

The previous prime is 38555809. The next prime is 38555879. The reversal of 38555865 is 56855583.

38555865 is a `hidden beast` number, since 38 + 5 + 558 + 65 = 666.

It is not a de Polignac number, because 38555865 - 2¹² = 38551769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 38555865.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 142665 + ... + 142934.

It is an arithmetic number, because the mean of its divisors is an integer number (4284000).

Almost surely, 2^38555865 is an apocalyptic number.

It is an amenable number.

38555865 is a deficient number, since it is larger than the sum of its proper divisors (29988135).

38555865 is a wasteful number, since it uses less digits than its factorization.

38555865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285613 (or 285607 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The square root of 38555865 is about 6209.3369211213. The cubic root of 38555865 is about 337.8289139175.

The spelling of 38555865 in words is "thirty-eight million, five hundred fifty-five thousand, eight hundred sixty-five".