728423656 has 16 divisors (see below), whose sum is σ = 1367915040. Its totient is φ = 363646320.

The previous prime is 728423629. The next prime is 728423737. The reversal of 728423656 is 656324827.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 65190 + ... + 75541.

It is an arithmetic number, because the mean of its divisors is an integer number (85494690).

Almost surely, 2^728423656 is an apocalyptic number.

It is an amenable number.

728423656 is a deficient number, since it is larger than the sum of its proper divisors (639491384).

728423656 is a wasteful number, since it uses less digits than its factorization.

728423656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141384 (or 141380 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 728423656 is about 26989.3248526153. The cubic root of 728423656 is about 899.7627588676.

The spelling of 728423656 in words is "seven hundred twenty-eight million, four hundred twenty-three thousand, six hundred fifty-six".