80806578 has 16 divisors (see below), whose sum is σ = 164263296. Its totient is φ = 26493840.

The previous prime is 80806549. The next prime is 80806633. The reversal of 80806578 is 87560808.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110026 + ... + 110757.

It is an arithmetic number, because the mean of its divisors is an integer number (10266456).

Almost surely, 2^80806578 is an apocalyptic number.

80806578 is an abundant number, since it is smaller than the sum of its proper divisors (83456718).

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

80806578 is a wasteful number, since it uses less digits than its factorization.

80806578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220849.

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 80806578 is about 8989.2479106986. The cubic root of 80806578 is about 432.3301980812.

The spelling of 80806578 in words is "eighty million, eight hundred six thousand, five hundred seventy-eight".