728142732 has 72 divisors (see below), whose sum is σ = 1873727856. Its totient is φ = 238379904.

The previous prime is 728142713. The next prime is 728142761. The reversal of 728142732 is 237241827.

728142732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 588018 + ... + 589254.

It is an arithmetic number, because the mean of its divisors is an integer number (26023998).

Almost surely, 2^728142732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728142732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936863928).

728142732 is an abundant number, since it is smaller than the sum of its proper divisors (1145585124).

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

728142732 is a wasteful number, since it uses less digits than its factorization.

728142732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527 (or 1522 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 728142732 is about 26984.1199967685. The cubic root of 728142732 is about 899.6470764384.

The spelling of 728142732 in words is "seven hundred twenty-eight million, one hundred forty-two thousand, seven hundred thirty-two".