728907380 has 18 divisors (see below), whose sum is σ = 1530959094. Its totient is φ = 291514656.

The previous prime is 728907359. The next prime is 728907383. The reversal of 728907380 is 83709827.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15376 + 728892004 = 124^2 + 26998^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728907383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117722 + ... + 123758.

It is an arithmetic number, because the mean of its divisors is an integer number (85053283).

Almost surely, 2^728907380 is an apocalyptic number.

It is an amenable number.

728907380 is an abundant number, since it is smaller than the sum of its proper divisors (802051714).

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

728907380 is an frugal number, since it uses more digits than its factorization.

728907380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12083 (or 6044 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 728907380 is about 26998.2847603325. The cubic root of 728907380 is about 899.9618831594.

The spelling of 728907380 in words is "seven hundred twenty-eight million, nine hundred seven thousand, three hundred eighty".