80505028 has 12 divisors (see below), whose sum is σ = 143272080. Its totient is φ = 39570152.

The previous prime is 80505023. The next prime is 80505049. The reversal of 80505028 is 82050508.

It is a junction number, because it is equal to n+sod(n) for n = 80504987 and 80505005.

It is not an unprimeable number, because it can be changed into a prime (80505023) 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 3 ways as a sum of consecutive naturals, for example, 170326 + ... + 170797.

It is an arithmetic number, because the mean of its divisors is an integer number (11939340).

Almost surely, 2^80505028 is an apocalyptic number.

It is an amenable number.

80505028 is a deficient number, since it is larger than the sum of its proper divisors (62767052).

80505028 is a wasteful number, since it uses less digits than its factorization.

80505028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341186 (or 341184 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 80505028 is about 8972.4594175733. The cubic root of 80505028 is about 431.7917449011.

The spelling of 80505028 in words is "eighty million, five hundred five thousand, twenty-eight".