80728072 has 32 divisors (see below), whose sum is σ = 154711800. Its totient is φ = 39481344.

The previous prime is 80728031. The next prime is 80728079. The reversal of 80728072 is 27082708.

It can be written as a sum of positive squares in 4 ways, for example, as 67667076 + 13060996 = 8226^2 + 3614^2 .

It is not an unprimeable number, because it can be changed into a prime (80728079) 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 7 ways as a sum of consecutive naturals, for example, 79504 + ... + 80512.

Almost surely, 2^80728072 is an apocalyptic number.

It is an amenable number.

80728072 is a deficient number, since it is larger than the sum of its proper divisors (73983728).

80728072 is a wasteful number, since it uses less digits than its factorization.

80728072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 80728072 is about 8984.8801884054. The cubic root of 80728072 is about 432.1901454901.

The spelling of 80728072 in words is "eighty million, seven hundred twenty-eight thousand, seventy-two".