19988332 has 48 divisors (see below), whose sum is σ = 43606080. Its totient is φ = 7805952.

The previous prime is 19988321. The next prime is 19988333. The reversal of 19988332 is 23388991.

It is a happy number.

It is a super-2 number, since 2×19988332² = 799066832284448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19988333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32088 + ... + 32704.

It is an arithmetic number, because the mean of its divisors is an integer number (908460).

Almost surely, 2^19988332 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 19988332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21803040).

19988332 is an abundant number, since it is smaller than the sum of its proper divisors (23617748).

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

19988332 is a wasteful number, since it uses less digits than its factorization.

19988332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 728 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 19988332 is about 4470.8312426214. The cubic root of 19988332 is about 271.3889650164.

The spelling of 19988332 in words is "nineteen million, nine hundred eighty-eight thousand, three hundred thirty-two".