80440000 has 70 divisors (see below), whose sum is σ = 199564244. Its totient is φ = 32160000.

The previous prime is 80439973. The next prime is 80440021. The reversal of 80440000 is 4408.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38995 + ... + 41005.

Almost surely, 2^80440000 is an apocalyptic number.

80440000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99782122).

80440000 is an abundant number, since it is smaller than the sum of its proper divisors (119124244).

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

80440000 is an equidigital number, since it uses as much as digits as its factorization.

80440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043 (or 2018 counting only the distinct ones).

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

The square root of 80440000 is about 8968.8349299115. The cubic root of 80440000 is about 431.6754535429.

Adding to 80440000 its reverse (4408), we get a palindrome (80444408).

It can be divided in two parts, 804 and 40000, that added together give a palindrome (40804).

The spelling of 80440000 in words is "eighty million, four hundred forty thousand".