728732532 has 48 divisors (see below), whose sum is σ = 1918929600. Its totient is φ = 213212160.

The previous prime is 728732497. The next prime is 728732533. The reversal of 728732532 is 235237827.

It is a super-2 number, since 2×728732532² = 1062102206390262048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728732533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91357 + ... + 99012.

It is an arithmetic number, because the mean of its divisors is an integer number (39977700).

Almost surely, 2^728732532 is an apocalyptic number.

It is an amenable number.

728732532 is an abundant number, since it is smaller than the sum of its proper divisors (1190197068).

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

728732532 is a wasteful number, since it uses less digits than its factorization.

728732532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190416 (or 190414 counting only the distinct ones).

The product of its digits is 141120, while the sum is 39.

The square root of 728732532 is about 26995.0464344850. The cubic root of 728732532 is about 899.8899174001.

The spelling of 728732532 in words is "seven hundred twenty-eight million, seven hundred thirty-two thousand, five hundred thirty-two".