1804386205440 has 576 divisors, whose sum is σ = 7880709043200. Its totient is φ = 380704997376.

The previous prime is 1804386205351. The next prime is 1804386205483. The reversal of 1804386205440 is 445026834081.

1804386205440 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 3 + 86 + 20 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2858091 + ... + 3431829.

Almost surely, 2^{1804386205440} is an apocalyptic number.

1804386205440 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 1804386205440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3940354521600).

1804386205440 is an abundant number, since it is smaller than the sum of its proper divisors (6076322837760).

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

1804386205440 is a wasteful number, since it uses less digits than its factorization.

1804386205440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573789 (or 573769 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 1804386205440 in words is "one trillion, eight hundred four billion, three hundred eighty-six million, two hundred five thousand, four hundred forty".