218938448 has 20 divisors (see below), whose sum is σ = 428314848. Its totient is φ = 108405600.

The previous prime is 218938441. The next prime is 218938451. The reversal of 218938448 is 844839812.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218938441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64778 + ... + 68073.

Almost surely, 2^218938448 is an apocalyptic number.

It is an amenable number.

218938448 is a deficient number, since it is larger than the sum of its proper divisors (209376400).

218938448 is a wasteful number, since it uses less digits than its factorization.

218938448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132962 (or 132956 counting only the distinct ones).

The product of its digits is 442368, while the sum is 47.

The square root of 218938448 is about 14796.5687914462. The cubic root of 218938448 is about 602.7085398069.

The spelling of 218938448 in words is "two hundred eighteen million, nine hundred thirty-eight thousand, four hundred forty-eight".