19980828 has 108 divisors (see below), whose sum is σ = 60252192. Its totient is φ = 5564160.

The previous prime is 19980823. The next prime is 19980869. The reversal of 19980828 is 82808991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980823) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82788 + ... + 83028.

Almost surely, 2^19980828 is an apocalyptic number.

19980828 is a gapful number since it is divisible by the number (18) 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 19980828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30126096).

19980828 is an abundant number, since it is smaller than the sum of its proper divisors (40271364).

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

19980828 is a wasteful number, since it uses less digits than its factorization.

19980828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 19980828 is about 4469.9919463015. The cubic root of 19980828 is about 271.3549992392.

The spelling of 19980828 in words is "nineteen million, nine hundred eighty thousand, eight hundred twenty-eight".