1828729 has 6 divisors (see below), whose sum is σ = 2127354. Its totient is φ = 1567440.

The previous prime is 1828727. The next prime is 1828759. The reversal of 1828729 is 9278281.

It can be written as a sum of positive squares in only one way, i.e., 1750329 + 78400 = 1323^2 + 280^2 .

It is not a de Polignac number, because 1828729 - 2¹ = 1828727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1828727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18612 + ... + 18709.

It is an arithmetic number, because the mean of its divisors is an integer number (354559).

2^1828729 is an apocalyptic number.

It is an amenable number.

1828729 is a deficient number, since it is larger than the sum of its proper divisors (298625).

1828729 is an equidigital number, since it uses as much as digits as its factorization.

1828729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37335 (or 37328 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 1828729 is about 1352.3050691320. The cubic root of 1828729 is about 122.2877958809.

It can be divided in two parts, 182 and 8729, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 1828729 in words is "one million, eight hundred twenty-eight thousand, seven hundred twenty-nine".