731448620928 has 160 divisors (see below), whose sum is σ = 2217852216360. Its totient is φ = 239215721472.

The previous prime is 731448620923. The next prime is 731448620951. The reversal of 731448620928 is 829026844137.

731448620928 is a `hidden beast` number, since 7 + 3 + 1 + 4 + 4 + 8 + 620 + 9 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731448620923) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 116050 + ... + 1215057.

Almost surely, 2^731448620928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731448620928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108926108180).

731448620928 is an abundant number, since it is smaller than the sum of its proper divisors (1486403595432).

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

731448620928 is a wasteful number, since it uses less digits than its factorization.

731448620928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331186 (or 1331165 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 731448620928 in words is "seven hundred thirty-one billion, four hundred forty-eight million, six hundred twenty thousand, nine hundred twenty-eight".