19989072 has 40 divisors (see below), whose sum is σ = 57377280. Its totient is φ = 6662880.

The previous prime is 19989071. The next prime is 19989089. The reversal of 19989072 is 27098991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19989071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22704 + ... + 23567.

It is an arithmetic number, because the mean of its divisors is an integer number (1434432).

Almost surely, 2^19989072 is an apocalyptic number.

19989072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19989072 is an abundant number, since it is smaller than the sum of its proper divisors (37388208).

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

19989072 is a wasteful number, since it uses less digits than its factorization.

19989072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46288 (or 46276 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 19989072 is about 4470.9140005149. The cubic root of 19989072 is about 271.3923140595.

The spelling of 19989072 in words is "nineteen million, nine hundred eighty-nine thousand, seventy-two".