38666947 has 16 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 33204640.

The previous prime is 38666939. The next prime is 38666981. The reversal of 38666947 is 74966683.

It is a cyclic number.

It is not a de Polignac number, because 38666947 - 2³ = 38666939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38666947.

It is not an unprimeable number, because it can be changed into a prime (38666447) 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, 13704 + ... + 16282.

It is an arithmetic number, because the mean of its divisors is an integer number (2786400).

Almost surely, 2^38666947 is an apocalyptic number.

38666947 is a deficient number, since it is larger than the sum of its proper divisors (5915453).

38666947 is a wasteful number, since it uses less digits than its factorization.

38666947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666.

The product of its digits is 1306368, while the sum is 49.

The square root of 38666947 is about 6218.2752431844. The cubic root of 38666947 is about 338.1530386649.

The spelling of 38666947 in words is "thirty-eight million, six hundred sixty-six thousand, nine hundred forty-seven".