38817813 has 8 divisors (see below), whose sum is σ = 54007488. Its totient is φ = 24753344.

The previous prime is 38817809. The next prime is 38817827. The reversal of 38817813 is 31871883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38817813 - 2² = 38817809 is a prime.

It is a super-2 number, since 2×38817813² = 3013645212205938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38817853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281220 + ... + 281357.

It is an arithmetic number, because the mean of its divisors is an integer number (6750936).

Almost surely, 2^38817813 is an apocalyptic number.

It is an amenable number.

38817813 is a deficient number, since it is larger than the sum of its proper divisors (15189675).

38817813 is a wasteful number, since it uses less digits than its factorization.

38817813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562603.

The product of its digits is 32256, while the sum is 39.

The square root of 38817813 is about 6230.3942892886. The cubic root of 38817813 is about 338.5922560900.

The spelling of 38817813 in words is "thirty-eight million, eight hundred seventeen thousand, eight hundred thirteen".