38865905 has 16 divisors (see below), whose sum is σ = 50576400. Its totient is φ = 28501248.

The previous prime is 38865899. The next prime is 38865913. The reversal of 38865905 is 50956883.

It can be written as a sum of positive squares in 8 ways, for example, as 3356224 + 35509681 = 1832^2 + 5959^2 .

It is a cyclic number.

It is not a de Polignac number, because 38865905 - 2⁸ = 38865649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7679 + ... + 11691.

It is an arithmetic number, because the mean of its divisors is an integer number (3161025).

Almost surely, 2^38865905 is an apocalyptic number.

It is an amenable number.

38865905 is a deficient number, since it is larger than the sum of its proper divisors (11710495).

38865905 is a wasteful number, since it uses less digits than its factorization.

38865905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 38865905 is about 6234.2525614543. The cubic root of 38865905 is about 338.7320274775.

The spelling of 38865905 in words is "thirty-eight million, eight hundred sixty-five thousand, nine hundred five".