1729128 has 16 divisors (see below), whose sum is σ = 4322880. Its totient is φ = 576368.

The previous prime is 1729127. The next prime is 1729129. The reversal of 1729128 is 8219271.

It is an interprime number because it is at equal distance from previous prime (1729127) and next prime (1729129).

It is a junction number, because it is equal to n+sod(n) for n = 1729095 and 1729104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36000 + ... + 36047.

It is an arithmetic number, because the mean of its divisors is an integer number (270180).

2^1729128 is an apocalyptic number.

It is an amenable number.

1729128 is an abundant number, since it is smaller than the sum of its proper divisors (2593752).

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

1729128 is a wasteful number, since it uses less digits than its factorization.

1729128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72056 (or 72052 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 1729128 is about 1314.9631173535. The cubic root of 1729128 is about 120.0261054316.

The spelling of 1729128 in words is "one million, seven hundred twenty-nine thousand, one hundred twenty-eight".