1803798780 has 144 divisors (see below), whose sum is σ = 5922717696. Its totient is φ = 408965760.

The previous prime is 1803798779. The next prime is 1803798791. The reversal of 1803798780 is 878973081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370965 + ... + 375795.

It is an arithmetic number, because the mean of its divisors is an integer number (41129984).

Almost surely, 2^1803798780 is an apocalyptic number.

1803798780 is a gapful number since it is divisible by the number (10) 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 1803798780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2961358848).

1803798780 is an abundant number, since it is smaller than the sum of its proper divisors (4118918916).

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

1803798780 is a wasteful number, since it uses less digits than its factorization.

1803798780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984 (or 4975 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The square root of 1803798780 is about 42471.1523271973. The cubic root of 1803798780 is about 1217.2955366151.

The spelling of 1803798780 in words is "one billion, eight hundred three million, seven hundred ninety-eight thousand, seven hundred eighty".