728807544 has 112 divisors (see below), whose sum is σ = 2169648720. Its totient is φ = 228614400.

The previous prime is 728807543. The next prime is 728807549. The reversal of 728807544 is 445708827.

728807544 is a `hidden beast` number, since 7 + 28 + 80 + 7 + 544 = 666.

728807544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 728807544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728807543) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 95469 + ... + 102819.

Almost surely, 2^728807544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728807544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1084824360).

728807544 is an abundant number, since it is smaller than the sum of its proper divisors (1440841176).

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

728807544 is a wasteful number, since it uses less digits than its factorization.

728807544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392 (or 7373 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The square root of 728807544 is about 26996.4357647449. The cubic root of 728807544 is about 899.9207930294.

The spelling of 728807544 in words is "seven hundred twenty-eight million, eight hundred seven thousand, five hundred forty-four".