720727928 has 16 divisors (see below), whose sum is σ = 1394957760. Its totient is φ = 348739200.

The previous prime is 720727913. The next prime is 720727933. The reversal of 720727928 is 829727027.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1452833 + ... + 1453328.

It is an arithmetic number, because the mean of its divisors is an integer number (87184860).

Almost surely, 2^720727928 is an apocalyptic number.

It is an amenable number.

720727928 is a deficient number, since it is larger than the sum of its proper divisors (674229832).

720727928 is a wasteful number, since it uses less digits than its factorization.

720727928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906198 (or 2906194 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 720727928 is about 26846.3764407787. The cubic root of 720727928 is about 896.5828975761.

The spelling of 720727928 in words is "seven hundred twenty million, seven hundred twenty-seven thousand, nine hundred twenty-eight".