219869128 has 8 divisors (see below), whose sum is σ = 412254630. Its totient is φ = 109934560.

The previous prime is 219869123. The next prime is 219869129. The reversal of 219869128 is 821968912.

219869128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 139192804 + 80676324 = 11798^2 + 8982^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (219869123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13741813 + ... + 13741828.

Almost surely, 2^219869128 is an apocalyptic number.

It is an amenable number.

219869128 is a deficient number, since it is larger than the sum of its proper divisors (192385502).

219869128 is a wasteful number, since it uses less digits than its factorization.

219869128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27483647 (or 27483643 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 219869128 is about 14827.9846236769. The cubic root of 219869128 is about 603.5613454667.

The spelling of 219869128 in words is "two hundred nineteen million, eight hundred sixty-nine thousand, one hundred twenty-eight".