728551324 has 12 divisors (see below), whose sum is σ = 1302092064. Its totient is φ = 356525024.

The previous prime is 728551309. The next prime is 728551331. The reversal of 728551324 is 423155827.

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, 1937449 + ... + 1937824.

It is an arithmetic number, because the mean of its divisors is an integer number (108507672).

Almost surely, 2^728551324 is an apocalyptic number.

It is an amenable number.

728551324 is a deficient number, since it is larger than the sum of its proper divisors (573540740).

728551324 is a wasteful number, since it uses less digits than its factorization.

728551324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875324 (or 3875322 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 728551324 is about 26991.6899063397. The cubic root of 728551324 is about 899.8153217778.

The spelling of 728551324 in words is "seven hundred twenty-eight million, five hundred fifty-one thousand, three hundred twenty-four".