19690528 has 72 divisors (see below), whose sum is σ = 45931536. Its totient is φ = 8236800.

The previous prime is 19690519. The next prime is 19690543. The reversal of 19690528 is 82509691.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59323 + ... + 59653.

It is an arithmetic number, because the mean of its divisors is an integer number (637938).

Almost surely, 2^19690528 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 19690528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22965768).

19690528 is an abundant number, since it is smaller than the sum of its proper divisors (26241008).

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

19690528 is a wasteful number, since it uses less digits than its factorization.

19690528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 19690528 is about 4437.4010411501. The cubic root of 19690528 is about 270.0344171947.

The spelling of 19690528 in words is "nineteen million, six hundred ninety thousand, five hundred twenty-eight".