1803318840 has 96 divisors (see below), whose sum is σ = 5867428320. Its totient is φ = 480340224.

The previous prime is 1803318833. The next prime is 1803318871. The reversal of 1803318840 is 488133081.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1803318795 and 1803318804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391189 + ... + 395771.

It is an arithmetic number, because the mean of its divisors is an integer number (61119045).

Almost surely, 2^1803318840 is an apocalyptic number.

1803318840 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 1803318840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2933714160).

1803318840 is an abundant number, since it is smaller than the sum of its proper divisors (4064109480).

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

1803318840 is a wasteful number, since it uses less digits than its factorization.

1803318840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693 (or 5686 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1803318840 is about 42465.5017631960. The cubic root of 1803318840 is about 1217.1875643642.

The spelling of 1803318840 in words is "one billion, eight hundred three million, three hundred eighteen thousand, eight hundred forty".