80559840 has 96 divisors (see below), whose sum is σ = 255618720. Its totient is φ = 21325824.

The previous prime is 80559827. The next prime is 80559881. The reversal of 80559840 is 4895508.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74826 + ... + 75894.

It is an arithmetic number, because the mean of its divisors is an integer number (2662695).

Almost surely, 2^80559840 is an apocalyptic number.

80559840 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 80559840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127809360).

80559840 is an abundant number, since it is smaller than the sum of its proper divisors (175058880).

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

80559840 is a wasteful number, since it uses less digits than its factorization.

80559840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 80559840 is about 8975.5133557920. The cubic root of 80559840 is about 431.8897180771.

The spelling of 80559840 in words is "eighty million, five hundred fifty-nine thousand, eight hundred forty".