38611993 has 8 divisors (see below), whose sum is σ = 44271488. Its totient is φ = 32988384.

The previous prime is 38611973. The next prime is 38611999. The reversal of 38611993 is 39911683.

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 38611993 - 2²⁵ = 5057561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38611999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6621 + ... + 11002.

It is an arithmetic number, because the mean of its divisors is an integer number (5533936).

Almost surely, 2^38611993 is an apocalyptic number.

It is an amenable number.

38611993 is a deficient number, since it is larger than the sum of its proper divisors (5659495).

38611993 is a wasteful number, since it uses less digits than its factorization.

38611993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17943.

The product of its digits is 34992, while the sum is 40.

The square root of 38611993 is about 6213.8549226708. The cubic root of 38611993 is about 337.9927667885.

The spelling of 38611993 in words is "thirty-eight million, six hundred eleven thousand, nine hundred ninety-three".