728342856 has 48 divisors (see below), whose sum is σ = 1990074060. Its totient is φ = 240629760.

The previous prime is 728342851. The next prime is 728342873. The reversal of 728342856 is 658243827.

It can be written as a sum of positive squares in 2 ways, for example, as 510308100 + 218034756 = 22590^2 + 14766^2 .

It is not an unprimeable number, because it can be changed into a prime (728342851) 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, 36625 + ... + 52896.

Almost surely, 2^728342856 is an apocalyptic number.

It is an amenable number.

728342856 is an abundant number, since it is smaller than the sum of its proper divisors (1261731204).

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

728342856 is a wasteful number, since it uses less digits than its factorization.

728342856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89646 (or 89639 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 728342856 is about 26987.8279229730. The cubic root of 728342856 is about 899.7294890717.

The spelling of 728342856 in words is "seven hundred twenty-eight million, three hundred forty-two thousand, eight hundred fifty-six".