38005999 has 4 divisors (see below), whose sum is σ = 40241664. Its totient is φ = 35770336.

The previous prime is 38005987. The next prime is 38006029. The reversal of 38005999 is 99950083.

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 38005999 - 2¹⁵ = 37973231 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 (38005699) 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, 1117807 + ... + 1117840.

It is an arithmetic number, because the mean of its divisors is an integer number (10060416).

Almost surely, 2^38005999 is an apocalyptic number.

38005999 is a deficient number, since it is larger than the sum of its proper divisors (2235665).

38005999 is a wasteful number, since it uses less digits than its factorization.

38005999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235664.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 38005999 is about 6164.9005669191. The cubic root of 38005999 is about 336.2152314073.

The spelling of 38005999 in words is "thirty-eight million, five thousand, nine hundred ninety-nine".