38864645 has 4 divisors (see below), whose sum is σ = 46637580. Its totient is φ = 31091712.

The previous prime is 38864621. The next prime is 38864677. The reversal of 38864645 is 54646883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54646883 = 7109 ⋅7687.

It can be written as a sum of positive squares in 2 ways, for example, as 23755876 + 15108769 = 4874^2 + 3887^2 .

It is a cyclic number.

It is not a de Polignac number, because 38864645 - 2¹⁶ = 38799109 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38864596 and 38864605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3886460 + ... + 3886469.

It is an arithmetic number, because the mean of its divisors is an integer number (11659395).

Almost surely, 2^38864645 is an apocalyptic number.

It is an amenable number.

38864645 is a deficient number, since it is larger than the sum of its proper divisors (7772935).

38864645 is an equidigital number, since it uses as much as digits as its factorization.

38864645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772934.

The product of its digits is 552960, while the sum is 44.

The square root of 38864645 is about 6234.1515060191. The cubic root of 38864645 is about 338.7283669686.

The spelling of 38864645 in words is "thirty-eight million, eight hundred sixty-four thousand, six hundred forty-five".