222287640 has 128 divisors (see below), whose sum is σ = 712419840. Its totient is φ = 55351296.

The previous prime is 222287629. The next prime is 222287641. The reversal of 222287640 is 46782222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222287641) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 117744 + ... + 119616.

It is an arithmetic number, because the mean of its divisors is an integer number (5565780).

Almost surely, 2^222287640 is an apocalyptic number.

222287640 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 222287640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356209920).

222287640 is an abundant number, since it is smaller than the sum of its proper divisors (490132200).

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

222287640 is a wasteful number, since it uses less digits than its factorization.

222287640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953 (or 1949 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 222287640 is about 14909.3138675125. The cubic root of 222287640 is about 605.7662944416.

The spelling of 222287640 in words is "two hundred twenty-two million, two hundred eighty-seven thousand, six hundred forty".