728604720 has 200 divisors, whose sum is σ = 2546778960. Its totient is φ = 193052160.

The previous prime is 728604713. The next prime is 728604731. The reversal of 728604720 is 27406827.

728604720 is a `hidden beast` number, since 7 + 28 + 604 + 7 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 1483675 + ... + 1484165.

Almost surely, 2^728604720 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 728604720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1273389480).

728604720 is an abundant number, since it is smaller than the sum of its proper divisors (1818174240).

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

728604720 is a wasteful number, since it uses less digits than its factorization.

728604720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 728604720 is about 26992.6790074642. The cubic root of 728604720 is about 899.8373039240.

The spelling of 728604720 in words is "seven hundred twenty-eight million, six hundred four thousand, seven hundred twenty".