38918817 has 12 divisors (see below), whose sum is σ = 64247040. Its totient is φ = 22239288.

The previous prime is 38918813. The next prime is 38918833. The reversal of 38918817 is 71881983.

It is not a de Polignac number, because 38918817 - 2² = 38918813 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (38918813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308817 + ... + 308942.

It is an arithmetic number, because the mean of its divisors is an integer number (5353920).

Almost surely, 2^38918817 is an apocalyptic number.

It is an amenable number.

38918817 is a deficient number, since it is larger than the sum of its proper divisors (25328223).

38918817 is a wasteful number, since it uses less digits than its factorization.

38918817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617772 (or 617769 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 38918817 is about 6238.4947703753. The cubic root of 38918817 is about 338.8856742427.

The spelling of 38918817 in words is "thirty-eight million, nine hundred eighteen thousand, eight hundred seventeen".