19896688 has 40 divisors (see below), whose sum is σ = 44818560. Its totient is φ = 8379840.

The previous prime is 19896649. The next prime is 19896689. The reversal of 19896688 is 88669891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19896689) by changing a digit.

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, 5103 + ... + 8113.

It is an arithmetic number, because the mean of its divisors is an integer number (1120464).

Almost surely, 2^19896688 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 19896688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22409280).

19896688 is an abundant number, since it is smaller than the sum of its proper divisors (24921872).

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

19896688 is a wasteful number, since it uses less digits than its factorization.

19896688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085 (or 3079 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 55.

The square root of 19896688 is about 4460.5703671167. The cubic root of 19896688 is about 270.9735680434.

The spelling of 19896688 in words is "nineteen million, eight hundred ninety-six thousand, six hundred eighty-eight".