38238813 has 6 divisors (see below), whose sum is σ = 55233854. Its totient is φ = 25492536.

The previous prime is 38238793. The next prime is 38238821. The reversal of 38238813 is 31883283.

It can be written as a sum of positive squares in only one way, i.e., 19342404 + 18896409 = 4398^2 + 4347^2 .

It is not a de Polignac number, because 38238813 - 2⁶ = 38238749 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 (38238413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2124370 + ... + 2124387.

Almost surely, 2^38238813 is an apocalyptic number.

It is an amenable number.

38238813 is a deficient number, since it is larger than the sum of its proper divisors (16995041).

38238813 is a wasteful number, since it uses less digits than its factorization.

38238813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248763 (or 4248760 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 38238813 is about 6183.7539569423. The cubic root of 38238813 is about 336.9003541532.

The spelling of 38238813 in words is "thirty-eight million, two hundred thirty-eight thousand, eight hundred thirteen".