80440560 has 160 divisors (see below), whose sum is σ = 279982080. Its totient is φ = 21226752.

The previous prime is 80440559. The next prime is 80440561. The reversal of 80440560 is 6504408.

It is an interprime number because it is at equal distance from previous prime (80440559) and next prime (80440561).

It is a super-2 number, since 2×80440560² = 12941367386227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80440561) 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, 360609 + ... + 360831.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^80440560 is an apocalyptic number.

80440560 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 80440560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139991040).

80440560 is an abundant number, since it is smaller than the sum of its proper divisors (199541520).

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

80440560 is a wasteful number, since it uses less digits than its factorization.

80440560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 80440560 is about 8968.8661490737. The cubic root of 80440560 is about 431.6764552738.

Adding to 80440560 its reverse (6504408), we get a palindrome (86944968).

The spelling of 80440560 in words is "eighty million, four hundred forty thousand, five hundred sixty".