1803894340 has 48 divisors (see below), whose sum is σ = 3949231104. Its totient is φ = 691344000.

The previous prime is 1803894331. The next prime is 1803894341. The reversal of 1803894340 is 434983081.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1803894293 and 1803894302.

It is not an unprimeable number, because it can be changed into a prime (1803894341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48217 + ... + 77023.

It is an arithmetic number, because the mean of its divisors is an integer number (82275648).

Almost surely, 2^1803894340 is an apocalyptic number.

1803894340 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 1803894340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1974615552).

1803894340 is an abundant number, since it is smaller than the sum of its proper divisors (2145336764).

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

1803894340 is a wasteful number, since it uses less digits than its factorization.

1803894340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28948 (or 28946 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1803894340 is about 42472.2773112062. The cubic root of 1803894340 is about 1217.3170324915.

The spelling of 1803894340 in words is "one billion, eight hundred three million, eight hundred ninety-four thousand, three hundred forty".