38805013 has 4 divisors (see below), whose sum is σ = 41790028. Its totient is φ = 35820000.

The previous prime is 38805007. The next prime is 38805043. The reversal of 38805013 is 31050883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31050883 = 19 ⋅1634257.

It can be written as a sum of positive squares in 2 ways, for example, as 11168964 + 27636049 = 3342^2 + 5257^2 .

It is a cyclic number.

It is not a de Polignac number, because 38805013 - 2⁹ = 38804501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38805043) 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, 1492488 + ... + 1492513.

It is an arithmetic number, because the mean of its divisors is an integer number (10447507).

Almost surely, 2^38805013 is an apocalyptic number.

It is an amenable number.

38805013 is a deficient number, since it is larger than the sum of its proper divisors (2985015).

38805013 is a wasteful number, since it uses less digits than its factorization.

38805013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985014.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 38805013 is about 6229.3669822864. The cubic root of 38805013 is about 338.5550355719. Note that the first 3 decimals are identical.

Adding to 38805013 its reverse (31050883), we get a palindrome (69855896).

The spelling of 38805013 in words is "thirty-eight million, eight hundred five thousand, thirteen".