80440 has 16 divisors (see below), whose sum is σ = 181080. Its totient is φ = 32160.

The previous prime is 80429. The next prime is 80447. The reversal of 80440 is 4408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966 + ... + 1045.

2⁸⁰⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

80440 is an abundant number, since it is smaller than the sum of its proper divisors (100640).

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 (90540).

80440 is a wasteful number, since it uses less digits than its factorization.

80440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 80440 is about 283.6194633660. The cubic root of 80440 is about 43.1675453543.

Adding to 80440 its reverse (4408), we get a palindrome (84848).

The spelling of 80440 in words is "eighty thousand, four hundred forty".