1803728 has 20 divisors (see below), whose sum is σ = 3541440. Its totient is φ = 889824.

The previous prime is 1803701. The next prime is 1803743. The reversal of 1803728 is 8273081.

It is a self number, because there is not a number n which added to its sum of digits gives 1803728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (177072).

2^1803728 is an apocalyptic number.

It is an amenable number.

1803728 is a deficient number, since it is larger than the sum of its proper divisors (1737712).

1803728 is a wasteful number, since it uses less digits than its factorization.

1803728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1803728 is about 1343.0294114427. The cubic root of 1803728 is about 121.7279614421.

The spelling of 1803728 in words is "one million, eight hundred three thousand, seven hundred twenty-eight".