38112813 has 12 divisors (see below), whose sum is σ = 55167840. Its totient is φ = 25355016.

The previous prime is 38112797. The next prime is 38112847. The reversal of 38112813 is 31821183.

38112813 is a `hidden beast` number, since 381 + 1 + 281 + 3 = 666.

It is not a de Polignac number, because 38112813 - 2⁴ = 38112797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38112013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318 + ... + 8736.

It is an arithmetic number, because the mean of its divisors is an integer number (4597320).

Almost surely, 2^38112813 is an apocalyptic number.

It is an amenable number.

38112813 is a deficient number, since it is larger than the sum of its proper divisors (17055027).

38112813 is a wasteful number, since it uses less digits than its factorization.

38112813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928 (or 8925 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 38112813 is about 6173.5575643222. The cubic root of 38112813 is about 336.5299089465.

Adding to 38112813 its reverse (31821183), we get a palindrome (69933996).

The spelling of 38112813 in words is "thirty-eight million, one hundred twelve thousand, eight hundred thirteen".