222447720 has 256 divisors, whose sum is σ = 806215680. Its totient is φ = 48435200.

The previous prime is 222447653. The next prime is 222447751. The reversal of 222447720 is 27744222.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 515905 + ... + 516335.

It is an arithmetic number, because the mean of its divisors is an integer number (3149280).

Almost surely, 2^222447720 is an apocalyptic number.

222447720 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 222447720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403107840).

222447720 is an abundant number, since it is smaller than the sum of its proper divisors (583767960).

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

222447720 is a wasteful number, since it uses less digits than its factorization.

222447720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 222447720 is about 14914.6813576422. The cubic root of 222447720 is about 605.9116733448.

The spelling of 222447720 in words is "two hundred twenty-two million, four hundred forty-seven thousand, seven hundred twenty".