222289920 has 280 divisors, whose sum is σ = 808795944. Its totient is φ = 58392576.

The previous prime is 222289889. The next prime is 222289927. The reversal of 222289920 is 29982222.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222289927) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3317727 + ... + 3317793.

Almost surely, 2^222289920 is an apocalyptic number.

222289920 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 222289920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404397972).

222289920 is an abundant number, since it is smaller than the sum of its proper divisors (586506024).

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

222289920 is an frugal number, since it uses more digits than its factorization.

222289920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 222289920 is about 14909.3903295876. The cubic root of 222289920 is about 605.7683655456.

The spelling of 222289920 in words is "two hundred twenty-two million, two hundred eighty-nine thousand, nine hundred twenty".