19788828 has 24 divisors (see below), whose sum is σ = 46514832. Its totient is φ = 6547584.

The previous prime is 19788793. The next prime is 19788851. The reversal of 19788828 is 82888791.

It is a happy number.

It is a super-2 number, since 2×19788828² = 783195427227168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4375 + ... + 7662.

It is an arithmetic number, because the mean of its divisors is an integer number (1938118).

Almost surely, 2^19788828 is an apocalyptic number.

It is an amenable number.

19788828 is an abundant number, since it is smaller than the sum of its proper divisors (26726004).

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

19788828 is a wasteful number, since it uses less digits than its factorization.

19788828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12181 (or 12179 counting only the distinct ones).

The product of its digits is 516096, while the sum is 51.

The square root of 19788828 is about 4448.4635549817. The cubic root of 19788828 is about 270.4830310877.

The spelling of 19788828 in words is "nineteen million, seven hundred eighty-eight thousand, eight hundred twenty-eight".