1728253269 has 12 divisors (see below), whose sum is σ = 2643211116. Its totient is φ = 1084394112.

The previous prime is 1728253253. The next prime is 1728253273. The reversal of 1728253269 is 9623528271.

It can be written as a sum of positive squares in 2 ways, for example, as 820135044 + 908118225 = 28638^2 + 30135^2 .

It is not a de Polignac number, because 1728253269 - 2⁴ = 1728253253 is a prime.

It is a super-2 number, since 2×1728253269² = 5973718723618372722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728253249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5647734 + ... + 5648039.

It is an arithmetic number, because the mean of its divisors is an integer number (220267593).

Almost surely, 2^1728253269 is an apocalyptic number.

It is an amenable number.

1728253269 is a deficient number, since it is larger than the sum of its proper divisors (914957847).

1728253269 is a wasteful number, since it uses less digits than its factorization.

1728253269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11295796 (or 11295793 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1728253269 is about 41572.2656226480. The cubic root of 1728253269 is about 1200.0586242193.

The spelling of 1728253269 in words is "one billion, seven hundred twenty-eight million, two hundred fifty-three thousand, two hundred sixty-nine".