38228813 has 16 divisors (see below), whose sum is σ = 45010944. Its totient is φ = 31789680.

The previous prime is 38228791. The next prime is 38228819. The reversal of 38228813 is 31882283.

It is a happy number.

38228813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 38228813 - 2⁸ = 38228557 is a prime.

It is a super-2 number, since 2×38228813² = 2922884286777938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38228819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42656 + ... + 43542.

It is an arithmetic number, because the mean of its divisors is an integer number (2813184).

Almost surely, 2^38228813 is an apocalyptic number.

It is an amenable number.

38228813 is a deficient number, since it is larger than the sum of its proper divisors (6782131).

38228813 is a wasteful number, since it uses less digits than its factorization.

38228813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072.

The product of its digits is 18432, while the sum is 35.

The square root of 38228813 is about 6182.9453337386. The cubic root of 38228813 is about 336.8709834955.

The spelling of 38228813 in words is "thirty-eight million, two hundred twenty-eight thousand, eight hundred thirteen".