38947865 has 16 divisors (see below), whose sum is σ = 52367040. Its totient is φ = 27558720.

The previous prime is 38947861. The next prime is 38947877. The reversal of 38947865 is 56874983.

It is not a de Polignac number, because 38947865 - 2² = 38947861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38947861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7535 + ... + 11604.

It is an arithmetic number, because the mean of its divisors is an integer number (3272940).

Almost surely, 2^38947865 is an apocalyptic number.

It is an amenable number.

38947865 is a deficient number, since it is larger than the sum of its proper divisors (13419175).

38947865 is a wasteful number, since it uses less digits than its factorization.

38947865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19192.

The product of its digits is 1451520, while the sum is 50.

The square root of 38947865 is about 6240.8224618234. The cubic root of 38947865 is about 338.9699651140.

The spelling of 38947865 in words is "thirty-eight million, nine hundred forty-seven thousand, eight hundred sixty-five".