1984020804 has 60 divisors (see below), whose sum is σ = 5194373184. Its totient is φ = 660352176.

The previous prime is 1984020803. The next prime is 1984020811. The reversal of 1984020804 is 4080204891.

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

It is not an unprimeable number, because it can be changed into a prime (1984020803) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 231337 + ... + 239759.

Almost surely, 2^1984020804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1984020804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597186592).

1984020804 is an abundant number, since it is smaller than the sum of its proper divisors (3210352380).

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

1984020804 is a wasteful number, since it uses less digits than its factorization.

1984020804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166 (or 9155 counting only the distinct ones).

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

The square root of 1984020804 is about 44542.3484338219. The cubic root of 1984020804 is about 1256.5566529629.

The spelling of 1984020804 in words is "one billion, nine hundred eighty-four million, twenty thousand, eight hundred four".