1800728 has 32 divisors (see below), whose sum is σ = 3576960. Its totient is φ = 848640.

The previous prime is 1800727. The next prime is 1800731. The reversal of 1800728 is 8270081.

It is a junction number, because it is equal to n+sod(n) for n = 1800697 and 1800706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13076 + ... + 13212.

It is an arithmetic number, because the mean of its divisors is an integer number (111780).

2^1800728 is an apocalyptic number.

It is an amenable number.

1800728 is a deficient number, since it is larger than the sum of its proper divisors (1776232).

1800728 is a wasteful number, since it uses less digits than its factorization.

1800728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 1800728 is about 1341.9120686543. The cubic root of 1800728 is about 121.6604371198.

The spelling of 1800728 in words is "one million, eight hundred thousand, seven hundred twenty-eight".