38917145 has 8 divisors (see below), whose sum is σ = 46811520. Its totient is φ = 31059760.

The previous prime is 38917141. The next prime is 38917147. The reversal of 38917145 is 54171983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38917145 - 2² = 38917141 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38917099 and 38917108.

It is not an unprimeable number, because it can be changed into a prime (38917141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6875 + ... + 11184.

It is an arithmetic number, because the mean of its divisors is an integer number (5851440).

Almost surely, 2^38917145 is an apocalyptic number.

It is an amenable number.

38917145 is a deficient number, since it is larger than the sum of its proper divisors (7894375).

38917145 is a wasteful number, since it uses less digits than its factorization.

38917145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495.

The product of its digits is 30240, while the sum is 38.

The square root of 38917145 is about 6238.3607622516. The cubic root of 38917145 is about 338.8808211921.

The spelling of 38917145 in words is "thirty-eight million, nine hundred seventeen thousand, one hundred forty-five".