728752532 has 24 divisors (see below), whose sum is σ = 1383275880. Its totient is φ = 334576640.

The previous prime is 728752529. The next prime is 728752537. The reversal of 728752532 is 235257827.

It can be written as a sum of positive squares in 4 ways, for example, as 11262736 + 717489796 = 3356^2 + 26786^2 .

It is a super-2 number, since 2×728752532² = 1062160505792822048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 728752532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728752537) 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 7 ways as a sum of consecutive naturals, for example, 127907 + ... + 133482.

It is an arithmetic number, because the mean of its divisors is an integer number (57636495).

Almost surely, 2^728752532 is an apocalyptic number.

It is an amenable number.

728752532 is a deficient number, since it is larger than the sum of its proper divisors (654523348).

728752532 is a wasteful number, since it uses less digits than its factorization.

728752532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261451 (or 261449 counting only the distinct ones).

The product of its digits is 235200, while the sum is 41.

The square root of 728752532 is about 26995.4168702763. The cubic root of 728752532 is about 899.8981497912.

The spelling of 728752532 in words is "seven hundred twenty-eight million, seven hundred fifty-two thousand, five hundred thirty-two".