80728258 has 12 divisors (see below), whose sum is σ = 131124258. Its totient is φ = 37259040.

The previous prime is 80728253. The next prime is 80728259. The reversal of 80728258 is 85282708.

It can be written as a sum of positive squares in 3 ways, for example, as 24433249 + 56295009 = 4943^2 + 7503^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80728258.

It is not an unprimeable number, because it can be changed into a prime (80728253) 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 5 ways as a sum of consecutive naturals, for example, 119083 + ... + 119758.

Almost surely, 2^80728258 is an apocalyptic number.

80728258 is a deficient number, since it is larger than the sum of its proper divisors (50396000).

80728258 is a wasteful number, since it uses less digits than its factorization.

80728258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238869 (or 238856 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 80728258 is about 8984.8905391218. The cubic root of 80728258 is about 432.1904774164.

The spelling of 80728258 in words is "eighty million, seven hundred twenty-eight thousand, two hundred fifty-eight".