222466640 has 80 divisors (see below), whose sum is σ = 570070656. Its totient is φ = 80064000.

The previous prime is 222466637. The next prime is 222466667. The reversal of 222466640 is 46664222.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 222466597 and 222466606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87629 + ... + 90131.

Almost surely, 2^222466640 is an apocalyptic number.

222466640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222466640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285035328).

222466640 is an abundant number, since it is smaller than the sum of its proper divisors (347604016).

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

222466640 is a wasteful number, since it uses less digits than its factorization.

222466640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628 (or 2622 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 222466640 is about 14915.3156185178. The cubic root of 222466640 is about 605.9288511996.

The spelling of 222466640 in words is "two hundred twenty-two million, four hundred sixty-six thousand, six hundred forty".