728741472720 has 80 divisors (see below), whose sum is σ = 2296133014272. Its totient is φ = 191145300480.

The previous prime is 728741472677. The next prime is 728741472727. The reversal of 728741472720 is 27274147827.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×728741472720² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728741472727) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24874072 + ... + 24903351.

Almost surely, 2^728741472720 is an apocalyptic number.

It is an amenable number.

728741472720 is an abundant number, since it is smaller than the sum of its proper divisors (1567391541552).

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

728741472720 is a wasteful number, since it uses less digits than its factorization.

728741472720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49777500 (or 49777494 counting only the distinct ones).

The product of its (nonzero) digits is 2458624, while the sum is 51.

The spelling of 728741472720 in words is "seven hundred twenty-eight billion, seven hundred forty-one million, four hundred seventy-two thousand, seven hundred twenty".