80450440 has 64 divisors (see below), whose sum is σ = 209548800. Its totient is φ = 27226368.

The previous prime is 80450407. The next prime is 80450441. The reversal of 80450440 is 4405408.

It is not an unprimeable number, because it can be changed into a prime (80450441) 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, 20302 + ... + 23938.

It is an arithmetic number, because the mean of its divisors is an integer number (3274200).

Almost surely, 2^80450440 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 80450440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104774400).

80450440 is an abundant number, since it is smaller than the sum of its proper divisors (129098360).

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

80450440 is a wasteful number, since it uses less digits than its factorization.

80450440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734 (or 3730 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 80450440 is about 8969.4169264228. The cubic root of 80450440 is about 431.6941279039.

Adding to 80450440 its reverse (4405408), we get a palindrome (84855848).

The spelling of 80450440 in words is "eighty million, four hundred fifty thousand, four hundred forty".