80728325 has 12 divisors (see below), whose sum is σ = 105992100. Its totient is φ = 60783360.

The previous prime is 80728313. The next prime is 80728327. The reversal of 80728325 is 52382708.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3587236 + 77141089 = 1894^2 + 8783^2 .

It is not a de Polignac number, because 80728325 - 2¹⁰ = 80727301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80728327) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 94550 + ... + 95399.

It is an arithmetic number, because the mean of its divisors is an integer number (8832675).

Almost surely, 2^80728325 is an apocalyptic number.

80728325 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80728325 is a deficient number, since it is larger than the sum of its proper divisors (25263775).

80728325 is a wasteful number, since it uses less digits than its factorization.

80728325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189976 (or 189971 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 80728325 is about 8984.8942676027. The cubic root of 80728325 is about 432.1905969811.

The spelling of 80728325 in words is "eighty million, seven hundred twenty-eight thousand, three hundred twenty-five".