1988304 has 40 divisors (see below), whose sum is σ = 5362752. Its totient is φ = 633600.

The previous prime is 1988299. The next prime is 1988323. The reversal of 1988304 is 4038891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204 + ... + 2004.

2^1988304 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 1988304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2681376).

1988304 is an abundant number, since it is smaller than the sum of its proper divisors (3374448).

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

1988304 is a wasteful number, since it uses less digits than its factorization.

1988304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835 (or 1829 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1988304 is about 1410.0723385699. The cubic root of 1988304 is about 125.7460240605.

The spelling of 1988304 in words is "one million, nine hundred eighty-eight thousand, three hundred four".