728202320 has 20 divisors (see below), whose sum is σ = 1693070580. Its totient is φ = 291280896.

The previous prime is 728202311. The next prime is 728202373. The reversal of 728202320 is 23202827.

It can be written as a sum of positive squares in 2 ways, for example, as 287370304 + 440832016 = 16952^2 + 20996^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 728202320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4551185 + ... + 4551344.

It is an arithmetic number, because the mean of its divisors is an integer number (84653529).

Almost surely, 2^728202320 is an apocalyptic number.

It is an amenable number.

728202320 is an abundant number, since it is smaller than the sum of its proper divisors (964868260).

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

728202320 is a wasteful number, since it uses less digits than its factorization.

728202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9102542 (or 9102536 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 728202320 is about 26985.2241050542. The cubic root of 728202320 is about 899.6716168229.

The spelling of 728202320 in words is "seven hundred twenty-eight million, two hundred two thousand, three hundred twenty".