728987232 has 24 divisors (see below), whose sum is σ = 1913591736. Its totient is φ = 242995712.

The previous prime is 728987197. The next prime is 728987243. The reversal of 728987232 is 232789827.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796713 + ... + 3796904.

It is an arithmetic number, because the mean of its divisors is an integer number (79732989).

Almost surely, 2^728987232 is an apocalyptic number.

It is an amenable number.

728987232 is an abundant number, since it is smaller than the sum of its proper divisors (1184604504).

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

728987232 is a wasteful number, since it uses less digits than its factorization.

728987232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593630 (or 7593622 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 728987232 is about 26999.7635545203. The cubic root of 728987232 is about 899.9947456483.

The spelling of 728987232 in words is "seven hundred twenty-eight million, nine hundred eighty-seven thousand, two hundred thirty-two".