1803699728 has 40 divisors (see below), whose sum is σ = 3760931160. Its totient is φ = 834877440.

The previous prime is 1803699727. The next prime is 1803699731. The reversal of 1803699728 is 8279963081.

It can be written as a sum of positive squares in 4 ways, for example, as 90402064 + 1713297664 = 9508^2 + 41392^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1803699728.

It is not an unprimeable number, because it can be changed into a prime (1803699727) 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, 37763 + ... + 70946.

It is an arithmetic number, because the mean of its divisors is an integer number (94023279).

Almost surely, 2^1803699728 is an apocalyptic number.

It is an amenable number.

1803699728 is an abundant number, since it is smaller than the sum of its proper divisors (1957231432).

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

1803699728 is a wasteful number, since it uses less digits than its factorization.

1803699728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108795 (or 108789 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 1803699728 is about 42469.9862020227. The cubic root of 1803699728 is about 1217.2732544245.

The spelling of 1803699728 in words is "one billion, eight hundred three million, six hundred ninety-nine thousand, seven hundred twenty-eight".