38093891 has 4 divisors (see below), whose sum is σ = 41556984. Its totient is φ = 34630800.

The previous prime is 38093863. The next prime is 38093893. The reversal of 38093891 is 19839083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19839083 = 11 ⋅1803553.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38093891 is a prime.

It is a super-2 number, since 2×38093891² = 2902289063039762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38093893) 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, 1731530 + ... + 1731551.

It is an arithmetic number, because the mean of its divisors is an integer number (10389246).

Almost surely, 2^38093891 is an apocalyptic number.

38093891 is a deficient number, since it is larger than the sum of its proper divisors (3463093).

38093891 is a wasteful number, since it uses less digits than its factorization.

38093891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463092.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 38093891 is about 6172.0248703323. The cubic root of 38093891 is about 336.4742070050.

The spelling of 38093891 in words is "thirty-eight million, ninety-three thousand, eight hundred ninety-one".