1728723201 has 8 divisors (see below), whose sum is σ = 2306123040. Its totient is φ = 1151902752.

The previous prime is 1728723197. The next prime is 1728723203. The reversal of 1728723201 is 1023278271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1728723201 - 2² = 1728723197 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1728723203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137836 + ... + 149853.

It is an arithmetic number, because the mean of its divisors is an integer number (288265380).

Almost surely, 2^1728723201 is an apocalyptic number.

It is an amenable number.

1728723201 is a deficient number, since it is larger than the sum of its proper divisors (577399839).

1728723201 is a wasteful number, since it uses less digits than its factorization.

1728723201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289695.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 1728723201 is about 41577.9172277785. The cubic root of 1728723201 is about 1200.1673842899.

The spelling of 1728723201 in words is "one billion, seven hundred twenty-eight million, seven hundred twenty-three thousand, two hundred one".