728242704 has 120 divisors (see below), whose sum is σ = 2431674720. Its totient is φ = 208063296.

The previous prime is 728242703. The next prime is 728242709. The reversal of 728242704 is 407242827.

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

It is not an unprimeable number, because it can be changed into a prime (728242703) 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 23 ways as a sum of consecutive naturals, for example, 3967 + ... + 38369.

It is an arithmetic number, because the mean of its divisors is an integer number (20263956).

Almost surely, 2^728242704 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 728242704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215837360).

728242704 is an abundant number, since it is smaller than the sum of its proper divisors (1703432016).

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

728242704 is a wasteful number, since it uses less digits than its factorization.

728242704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34434 (or 34415 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 728242704 is about 26985.9723560223. The cubic root of 728242704 is about 899.6882475796.

The spelling of 728242704 in words is "seven hundred twenty-eight million, two hundred forty-two thousand, seven hundred four".