19880616 has 64 divisors (see below), whose sum is σ = 60151680. Its totient is φ = 5345280.

The previous prime is 19880603. The next prime is 19880629. The reversal of 19880616 is 61608891.

It is an interprime number because it is at equal distance from previous prime (19880603) and next prime (19880629).

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 15 ways as a sum of consecutive naturals, for example, 625 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (939870).

Almost surely, 2^19880616 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 19880616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30075840).

19880616 is an abundant number, since it is smaller than the sum of its proper divisors (40271064).

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

19880616 is a wasteful number, since it uses less digits than its factorization.

19880616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994 (or 6990 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 19880616 is about 4458.7684398273. The cubic root of 19880616 is about 270.9005867118.

The spelling of 19880616 in words is "nineteen million, eight hundred eighty thousand, six hundred sixteen".