19528980 has 48 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 5173888.

The previous prime is 19528931. The next prime is 19528991. The reversal of 19528980 is 8982591.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 9046 + ... + 10994.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^19528980 is an apocalyptic number.

19528980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19528980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518400).

19528980 is an abundant number, since it is smaller than the sum of its proper divisors (35507820).

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

19528980 is a wasteful number, since it uses less digits than its factorization.

19528980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128 (or 2126 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 19528980 is about 4419.1605537704. The cubic root of 19528980 is about 269.2939026407.

The spelling of 19528980 in words is "nineteen million, five hundred twenty-eight thousand, nine hundred eighty".