38915865 has 24 divisors (see below), whose sum is σ = 68564808. Its totient is φ = 20413440.

The previous prime is 38915861. The next prime is 38915867. The reversal of 38915865 is 56851983.

38915865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5322249 + 33593616 = 2307^2 + 5796^2 .

It is not a de Polignac number, because 38915865 - 2² = 38915861 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 38915865.

It is not an unprimeable number, because it can be changed into a prime (38915861) 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 23 ways as a sum of consecutive naturals, for example, 4344 + ... + 9833.

It is an arithmetic number, because the mean of its divisors is an integer number (2856867).

Almost surely, 2^38915865 is an apocalyptic number.

It is an amenable number.

38915865 is a deficient number, since it is larger than the sum of its proper divisors (29648943).

38915865 is a wasteful number, since it uses less digits than its factorization.

38915865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14249 (or 14246 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 38915865 is about 6238.2581703549. The cubic root of 38915865 is about 338.8771058441.

The spelling of 38915865 in words is "thirty-eight million, nine hundred fifteen thousand, eight hundred sixty-five".