728518830 has 64 divisors (see below), whose sum is σ = 1908809280. Its totient is φ = 176864256.

The previous prime is 728518807. The next prime is 728518853. The reversal of 728518830 is 38815827.

It is a happy number.

728518830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (728518807) and next prime (728518853).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15676 + ... + 41264.

It is an arithmetic number, because the mean of its divisors is an integer number (29825145).

Almost surely, 2^728518830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728518830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954404640).

728518830 is an abundant number, since it is smaller than the sum of its proper divisors (1180290450).

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

728518830 is a wasteful number, since it uses less digits than its factorization.

728518830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25685.

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 728518830 is about 26991.0879736257. The cubic root of 728518830 is about 899.8019440729.

The spelling of 728518830 in words is "seven hundred twenty-eight million, five hundred eighteen thousand, eight hundred thirty".