1804831440 has 80 divisors (see below), whose sum is σ = 5619580800. Its totient is φ = 479172096.

The previous prime is 1804831429. The next prime is 1804831493. The reversal of 1804831440 is 441384081.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38541 + ... + 71379.

It is an arithmetic number, because the mean of its divisors is an integer number (70244760).

Almost surely, 2^1804831440 is an apocalyptic number.

1804831440 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 1804831440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2809790400).

1804831440 is an abundant number, since it is smaller than the sum of its proper divisors (3814749360).

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

1804831440 is a wasteful number, since it uses less digits than its factorization.

1804831440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33084 (or 33078 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1804831440 is about 42483.3077808214. The cubic root of 1804831440 is about 1217.5277895350.

The spelling of 1804831440 in words is "one billion, eight hundred four million, eight hundred thirty-one thousand, four hundred forty".