1728243450540 has 36 divisors (see below), whose sum is σ = 5242338467184. Its totient is φ = 460864920096.

The previous prime is 1728243450529. The next prime is 1728243450569. The reversal of 1728243450540 is 450543428271.

1728243450540 is a `hidden beast` number, since 1 + 7 + 2 + 8 + 24 + 34 + 50 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4800676072 + ... + 4800676431.

Almost surely, 2^{1728243450540} is an apocalyptic number.

1728243450540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728243450540 is an abundant number, since it is smaller than the sum of its proper divisors (3514095016644).

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

1728243450540 is a wasteful number, since it uses less digits than its factorization.

1728243450540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9601352518 (or 9601352513 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 45.

The spelling of 1728243450540 in words is "one trillion, seven hundred twenty-eight billion, two hundred forty-three million, four hundred fifty thousand, five hundred forty".