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80140 = 2254007

80140 has 12 divisors (see below), whose sum is σ = 168336. Its totient is φ = 32048.

The previous prime is 80111. The next prime is 80141. The reversal of 80140 is 4108.

It is a self number, because there is not a number n which added to its sum of digits gives 80140.

It is not an unprimeable number, because it can be changed into a prime (80141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984 + ... + 2023.

It is an arithmetic number, because the mean of its divisors is an integer number (14028).

280140 is an apocalyptic number.

It is an amenable number.

80140 is an abundant number, since it is smaller than the sum of its proper divisors (88196).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84168).

80140 is a wasteful number, since it uses less digits than its factorization.

80140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 80140 is about 283.0900916669. The cubic root of 80140 is about 43.1138142241.

Subtracting from 80140 its product of nonzero digits (32), we obtain a palindrome (80108).

Adding to 80140 its reverse (4108), we get a palindrome (84248).

It can be divided in two parts, 801 and 40, that added together give a square (841 = 292).

The spelling of 80140 in words is "eighty thousand, one hundred forty".

Divisors: 1 2 4 5 10 20 4007 8014 16028 20035 40070 80140