219469128 has 32 divisors (see below), whose sum is σ = 572529600. Its totient is φ = 69975488.

The previous prime is 219469109. The next prime is 219469139. The reversal of 219469128 is 821964912.

It is a self number, because there is not a number n which added to its sum of digits gives 219469128.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198243 + ... + 199346.

It is an arithmetic number, because the mean of its divisors is an integer number (17891550).

Almost surely, 2^219469128 is an apocalyptic number.

It is an amenable number.

219469128 is an abundant number, since it is smaller than the sum of its proper divisors (353060472).

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

219469128 is a wasteful number, since it uses less digits than its factorization.

219469128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397621 (or 397617 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 219469128 is about 14814.4904738570. The cubic root of 219469128 is about 603.1951107986.

The spelling of 219469128 in words is "two hundred nineteen million, four hundred sixty-nine thousand, one hundred twenty-eight".