728007124 has 24 divisors (see below), whose sum is σ = 1374385320. Its totient is φ = 335422464.

The previous prime is 728007113. The next prime is 728007139. The reversal of 728007124 is 421700827.

It can be written as a sum of positive squares in 4 ways, for example, as 2782224 + 725224900 = 1668^2 + 26930^2 .

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19032 + ... + 42640.

It is an arithmetic number, because the mean of its divisors is an integer number (57266055).

Almost surely, 2^728007124 is an apocalyptic number.

It is an amenable number.

728007124 is a deficient number, since it is larger than the sum of its proper divisors (646378196).

728007124 is a wasteful number, since it uses less digits than its factorization.

728007124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24219 (or 24217 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 728007124 is about 26981.6071426444. The cubic root of 728007124 is about 899.5912234168.

The spelling of 728007124 in words is "seven hundred twenty-eight million, seven thousand, one hundred twenty-four".