1728731443000 has 64 divisors (see below), whose sum is σ = 4046720277600. Its totient is φ = 691238099200.

The previous prime is 1728731442953. The next prime is 1728731443009. The reversal of 1728731443000 is 3441378271.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728731443009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2412267 + ... + 3045733.

Almost surely, 2^{1728731443000} is an apocalyptic number.

1728731443000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728731443000 is an abundant number, since it is smaller than the sum of its proper divisors (2317988834600).

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

1728731443000 is a wasteful number, since it uses less digits than its factorization.

1728731443000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636217 (or 636203 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 1728731443000 in words is "one trillion, seven hundred twenty-eight billion, seven hundred thirty-one million, four hundred forty-three thousand".