1801728 has 120 divisors (see below), whose sum is σ = 5745168. Its totient is φ = 540672.

The previous prime is 1801727. The next prime is 1801733. The reversal of 1801728 is 8271081.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801727) 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, 78325 + ... + 78347.

2^1801728 is an apocalyptic number.

1801728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1801728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2872584).

1801728 is an abundant number, since it is smaller than the sum of its proper divisors (3943440).

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

1801728 is a wasteful number, since it uses less digits than its factorization.

1801728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1801728 is about 1342.2846195945. The cubic root of 1801728 is about 121.6829535545.

The spelling of 1801728 in words is "one million, eight hundred one thousand, seven hundred twenty-eight".