38993863 has 4 divisors (see below), whose sum is σ = 39084768. Its totient is φ = 38902960.

The previous prime is 38993861. The next prime is 38993873. The reversal of 38993863 is 36839983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38993863 - 2¹ = 38993861 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 (38993861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44806 + ... + 45667.

It is an arithmetic number, because the mean of its divisors is an integer number (9771192).

Almost surely, 2^38993863 is an apocalyptic number.

38993863 is a deficient number, since it is larger than the sum of its proper divisors (90905).

38993863 is an equidigital number, since it uses as much as digits as its factorization.

38993863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90904.

The product of its digits is 839808, while the sum is 49.

The square root of 38993863 is about 6244.5066258272. The cubic root of 38993863 is about 339.1033554498.

The spelling of 38993863 in words is "thirty-eight million, nine hundred ninety-three thousand, eight hundred sixty-three".