80528305 has 48 divisors (see below), whose sum is σ = 118101312. Its totient is φ = 51955200.

The previous prime is 80528291. The next prime is 80528321. The reversal of 80528305 is 50382508.

It is a de Polignac number, because none of the positive numbers 2^k-80528305 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1201882 + ... + 1201948.

It is an arithmetic number, because the mean of its divisors is an integer number (2460444).

Almost surely, 2^80528305 is an apocalyptic number.

It is an amenable number.

80528305 is a deficient number, since it is larger than the sum of its proper divisors (37573007).

80528305 is a wasteful number, since it uses less digits than its factorization.

80528305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 80528305 is about 8973.7564598110. The cubic root of 80528305 is about 431.8333565791.

The spelling of 80528305 in words is "eighty million, five hundred twenty-eight thousand, three hundred five".