80005138 has 4 divisors (see below), whose sum is σ = 120007710.
Its totient is φ = 40002568.
The previous prime is 80005097. The next prime is 80005151. The reversal of 80005138 is 83150008.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 79977249 + 27889 = 8943^2 + 167^2
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20001283 + ... + 20001286.
Almost surely, 280005138 is an apocalyptic number.
80005138 is a deficient number, since it is larger than the sum of its proper divisors (40002572).
80005138 is a wasteful number, since it uses less digits than its factorization.
80005138 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 40002571.
The product of its (nonzero) digits is 960, while the sum is 25.
The square root of 80005138 is about 8944.5591283193.
The cubic root of 80005138 is about 430.8961623801.
The spelling of 80005138 in words is "eighty million, five thousand, one hundred thirty-eight".