728174685231720 has 64 divisors (see below), whose sum is σ = 2427248950776000. Its totient is φ = 194179916061504.

The previous prime is 728174685231713. The next prime is 728174685231839. The reversal of 728174685231720 is 27132586471827.

728174685231720 is a `hidden beast` number, since 7 + 2 + 8 + 1 + 74 + 6 + 8 + 523 + 17 + 20 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337117908750 + ... + 337117910909.

It is an arithmetic number, because the mean of its divisors is an integer number (37925764855875).

Almost surely, 2^{728174685231720} is an apocalyptic number.

It is an amenable number.

728174685231720 is an abundant number, since it is smaller than the sum of its proper divisors (1699074265544280).

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

728174685231720 is a wasteful number, since it uses less digits than its factorization.

728174685231720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674235819679 (or 674235819669 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 63.

The spelling of 728174685231720 in words is "seven hundred twenty-eight trillion, one hundred seventy-four billion, six hundred eighty-five million, two hundred thirty-one thousand, seven hundred twenty".