80440140 has 96 divisors (see below), whose sum is σ = 247129344. Its totient is φ = 19388160.

The previous prime is 80440123. The next prime is 80440159. The reversal of 80440140 is 4104408.

It is a super-2 number, since 2×80440140² = 12941232246439200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202422 + ... + 202818.

It is an arithmetic number, because the mean of its divisors is an integer number (2574264).

Almost surely, 2^80440140 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 80440140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123564672).

80440140 is an abundant number, since it is smaller than the sum of its proper divisors (166689204).

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

80440140 is a wasteful number, since it uses less digits than its factorization.

80440140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 80440140 is about 8968.8427347122. The cubic root of 80440140 is about 431.6757039761.

Adding to 80440140 its reverse (4104408), we get a palindrome (84544548).

The spelling of 80440140 in words is "eighty million, four hundred forty thousand, one hundred forty".