1728447852780 has 240 divisors, whose sum is σ = 6226456642560. Its totient is φ = 396964022400.

The previous prime is 1728447852779. The next prime is 1728447852797. The reversal of 1728447852780 is 872587448271.

1728447852780 is a `hidden beast` number, since 1 + 7 + 2 + 84 + 478 + 5 + 2 + 7 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2213916 + ... + 2891075.

It is an arithmetic number, because the mean of its divisors is an integer number (25943569344).

Almost surely, 2^{1728447852780} is an apocalyptic number.

1728447852780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728447852780 is an abundant number, since it is smaller than the sum of its proper divisors (4498008789780).

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

1728447852780 is a wasteful number, since it uses less digits than its factorization.

1728447852780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5105042 (or 5105031 counting only the distinct ones).

The product of its (nonzero) digits is 56197120, while the sum is 63.

The spelling of 1728447852780 in words is "one trillion, seven hundred twenty-eight billion, four hundred forty-seven million, eight hundred fifty-two thousand, seven hundred eighty".