1831728 has 40 divisors (see below), whose sum is σ = 4888576. Its totient is φ = 590400.

The previous prime is 1831723. The next prime is 1831741. The reversal of 1831728 is 8271381.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1831695 and 1831704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1831723) 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, 873 + ... + 2103.

2^1831728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1831728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2444288).

1831728 is an abundant number, since it is smaller than the sum of its proper divisors (3056848).

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

1831728 is a wasteful number, since it uses less digits than its factorization.

1831728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1267 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 1831728 is about 1353.4134623241. The cubic root of 1831728 is about 122.3546074579.

The spelling of 1831728 in words is "one million, eight hundred thirty-one thousand, seven hundred twenty-eight".