80005140 has 36 divisors (see below), whose sum is σ = 242682804. Its totient is φ = 21334656.

The previous prime is 80005097. The next prime is 80005151. The reversal of 80005140 is 4150008.

It can be written as a sum of positive squares in 2 ways, for example, as 12830724 + 67174416 = 3582^2 + 8196^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222057 + ... + 222416.

It is an arithmetic number, because the mean of its divisors is an integer number (6741189).

Almost surely, 2^80005140 is an apocalyptic number.

It is an amenable number.

80005140 is an abundant number, since it is smaller than the sum of its proper divisors (162677664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80005140 is a wasteful number, since it uses less digits than its factorization.

80005140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444488 (or 444483 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 80005140 is about 8944.5592401191. The cubic root of 80005140 is about 430.8961659707.

Adding to 80005140 its reverse (4150008), we get a palindrome (84155148).

The spelling of 80005140 in words is "eighty million, five thousand, one hundred forty".