720917009328 has 40 divisors (see below), whose sum is σ = 1862499889600. Its totient is φ = 240288773184.

The previous prime is 720917009257. The next prime is 720917009363. The reversal of 720917009328 is 823900719027.

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

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 7 ways as a sum of consecutive naturals, for example, 171303 + ... + 1212921.

It is an arithmetic number, because the mean of its divisors is an integer number (46562497240).

Almost surely, 2^720917009328 is an apocalyptic number.

It is an amenable number.

720917009328 is an abundant number, since it is smaller than the sum of its proper divisors (1141582880272).

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

720917009328 is a wasteful number, since it uses less digits than its factorization.

720917009328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056049 (or 1056043 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 720917009328 in words is "seven hundred twenty billion, nine hundred seventeen million, nine thousand, three hundred twenty-eight".