38648217 has 4 divisors (see below), whose sum is σ = 51530960. Its totient is φ = 25765476.

The previous prime is 38648209. The next prime is 38648231. The reversal of 38648217 is 71284683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71284683 = 3 ⋅23761561.

It is not a de Polignac number, because 38648217 - 2³ = 38648209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38648287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6441367 + ... + 6441372.

It is an arithmetic number, because the mean of its divisors is an integer number (12882740).

Almost surely, 2^38648217 is an apocalyptic number.

It is an amenable number.

38648217 is a deficient number, since it is larger than the sum of its proper divisors (12882743).

38648217 is a wasteful number, since it uses less digits than its factorization.

38648217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12882742.

The product of its digits is 64512, while the sum is 39.

The square root of 38648217 is about 6216.7690161369. The cubic root of 38648217 is about 338.0984301872.

The spelling of 38648217 in words is "thirty-eight million, six hundred forty-eight thousand, two hundred seventeen".