728807550 has 24 divisors (see below), whose sum is σ = 1807443096. Its totient is φ = 194348640.

The previous prime is 728807549. The next prime is 728807557. The reversal of 728807550 is 55708827.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728807557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2429209 + ... + 2429508.

It is an arithmetic number, because the mean of its divisors is an integer number (75310129).

Almost surely, 2^728807550 is an apocalyptic number.

728807550 is an abundant number, since it is smaller than the sum of its proper divisors (1078635546).

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

728807550 is a wasteful number, since it uses less digits than its factorization.

728807550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858732 (or 4858727 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 728807550 is about 26996.4358758707. The cubic root of 728807550 is about 899.9207954989.

The spelling of 728807550 in words is "seven hundred twenty-eight million, eight hundred seven thousand, five hundred fifty".