221888368 has 40 divisors (see below), whose sum is σ = 467518688. Its totient is φ = 101405952.

The previous prime is 221888347. The next prime is 221888393. The reversal of 221888368 is 863888122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16246 + ... + 26602.

Almost surely, 2^221888368 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 221888368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233759344).

221888368 is an abundant number, since it is smaller than the sum of its proper divisors (245630320).

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

221888368 is a wasteful number, since it uses less digits than its factorization.

221888368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10481 (or 10475 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The square root of 221888368 is about 14895.9178300634. The cubic root of 221888368 is about 605.4033855590.

The spelling of 221888368 in words is "two hundred twenty-one million, eight hundred eighty-eight thousand, three hundred sixty-eight".