80740140 has 96 divisors (see below), whose sum is σ = 257826240. Its totient is φ = 18702336.

The previous prime is 80740129. The next prime is 80740141. The reversal of 80740140 is 4104708.

It is a self number, because there is not a number n which added to its sum of digits gives 80740140.

It is not an unprimeable number, because it can be changed into a prime (80740141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10216 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (2685690).

Almost surely, 2^80740140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80740140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128913120).

80740140 is an abundant number, since it is smaller than the sum of its proper divisors (177086100).

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

80740140 is a wasteful number, since it uses less digits than its factorization.

80740140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131 (or 6129 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 80740140 is about 8985.5517359815. The cubic root of 80740140 is about 432.2116803816.

Adding to 80740140 its reverse (4104708), we get a palindrome (84844848).

The spelling of 80740140 in words is "eighty million, seven hundred forty thousand, one hundred forty".