80578728 has 48 divisors (see below), whose sum is σ = 218836800. Its totient is φ = 26785440.

The previous prime is 80578721. The next prime is 80578739. The reversal of 80578728 is 82787508.

It is a happy number.

80578728 is a `hidden beast` number, since 8 + 0 + 578 + 72 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (80578721) 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 11 ways as a sum of consecutive naturals, for example, 28833 + ... + 31503.

It is an arithmetic number, because the mean of its divisors is an integer number (4559100).

Almost surely, 2^80578728 is an apocalyptic number.

It is an amenable number.

80578728 is an abundant number, since it is smaller than the sum of its proper divisors (138258072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80578728 is a wasteful number, since it uses less digits than its factorization.

80578728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102 (or 3095 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 80578728 is about 8976.5654902084. The cubic root of 80578728 is about 431.9234689532.

It can be divided in two parts, 805787 and 28, that added together give a triangular number (805815 = T₁₂₆₉).

The spelling of 80578728 in words is "eighty million, five hundred seventy-eight thousand, seven hundred twenty-eight".