219448728 has 96 divisors (see below), whose sum is σ = 617198400. Its totient is φ = 70387200.

The previous prime is 219448703. The next prime is 219448759. The reversal of 219448728 is 827844912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232738 + ... + 233678.

It is an arithmetic number, because the mean of its divisors is an integer number (6429150).

Almost surely, 2^219448728 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 219448728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308599200).

219448728 is an abundant number, since it is smaller than the sum of its proper divisors (397749672).

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

219448728 is a wasteful number, since it uses less digits than its factorization.

219448728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1066 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 219448728 is about 14813.8019427830. The cubic root of 219448728 is about 603.1764209087.

The spelling of 219448728 in words is "two hundred nineteen million, four hundred forty-eight thousand, seven hundred twenty-eight".