805608880 has 40 divisors (see below), whose sum is σ = 1875317472. Its totient is φ = 321851904.

The previous prime is 805608857. The next prime is 805608887. The reversal of 805608880 is 88806508.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (805608887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65284 + ... + 76636.

Almost surely, 2^805608880 is an apocalyptic number.

805608880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

805608880 is the 14192-nd decagonal number.

It is an amenable number.

805608880 is an abundant number, since it is smaller than the sum of its proper divisors (1069708592).

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

805608880 is a wasteful number, since it uses less digits than its factorization.

805608880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12253 (or 12247 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 805608880 is about 28383.2499900910. The cubic root of 805608880 is about 930.4822257281.

The spelling of 805608880 in words is "eight hundred five million, six hundred eight thousand, eight hundred eighty".