219428238 has 16 divisors (see below), whose sum is σ = 439021440. Its totient is φ = 73115256.

The previous prime is 219428221. The next prime is 219428263. The reversal of 219428238 is 832824912.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 219428196 and 219428205.

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 7 ways as a sum of consecutive naturals, for example, 16573 + ... + 26711.

It is an arithmetic number, because the mean of its divisors is an integer number (27438840).

Almost surely, 2^219428238 is an apocalyptic number.

219428238 is an abundant number, since it is smaller than the sum of its proper divisors (219593202).

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

219428238 is a wasteful number, since it uses less digits than its factorization.

219428238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751.

The product of its digits is 55296, while the sum is 39.

The square root of 219428238 is about 14813.1103418560. The cubic root of 219428238 is about 603.1576473974.

The spelling of 219428238 in words is "two hundred nineteen million, four hundred twenty-eight thousand, two hundred thirty-eight".