80641140 has 48 divisors (see below), whose sum is σ = 228529728. Its totient is φ = 21243904.

The previous prime is 80641139. The next prime is 80641147. The reversal of 80641140 is 4114608.

It is a self number, because there is not a number n which added to its sum of digits gives 80641140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80641147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3117 + ... + 13076.

It is an arithmetic number, because the mean of its divisors is an integer number (4761036).

Almost surely, 2^80641140 is an apocalyptic number.

It is an amenable number.

80641140 is an abundant number, since it is smaller than the sum of its proper divisors (147888588).

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

80641140 is a wasteful number, since it uses less digits than its factorization.

80641140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16288 (or 16286 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 80641140 is about 8980.0412025781. The cubic root of 80641140 is about 432.0349551619.

Adding to 80641140 its reverse (4114608), we get a palindrome (84755748).

The spelling of 80641140 in words is "eighty million, six hundred forty-one thousand, one hundred forty".