1804821984 has 144 divisors (see below), whose sum is σ = 6055096320. Its totient is φ = 499011840.

The previous prime is 1804821979. The next prime is 1804822013. The reversal of 1804821984 is 4891284081.

1804821984 is a `hidden beast` number, since 1 + 80 + 482 + 1 + 98 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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, 48057 + ... + 76935.

It is an arithmetic number, because the mean of its divisors is an integer number (42049280).

Almost surely, 2^1804821984 is an apocalyptic number.

1804821984 is a gapful number since it is divisible by the number (14) 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 1804821984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3027548160).

1804821984 is an abundant number, since it is smaller than the sum of its proper divisors (4250274336).

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

1804821984 is a wasteful number, since it uses less digits than its factorization.

1804821984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28933 (or 28922 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 1804821984 is about 42483.1964899065. The cubic root of 1804821984 is about 1217.5256632122.

The spelling of 1804821984 in words is "one billion, eight hundred four million, eight hundred twenty-one thousand, nine hundred eighty-four".