222747840 has 448 divisors, whose sum is σ = 936345600. Its totient is φ = 48771072.

The previous prime is 222747823. The next prime is 222747851. The reversal of 222747840 is 48747222.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-3 number, since 3×222747840³ (a number of 26 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 222747795 and 222747804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1753857 + ... + 1753983.

Almost surely, 2^222747840 is an apocalyptic number.

222747840 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 222747840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468172800).

222747840 is an abundant number, since it is smaller than the sum of its proper divisors (713597760).

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

222747840 is a wasteful number, since it uses less digits than its factorization.

222747840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 222747840 is about 14924.7391937012. The cubic root of 222747840 is about 606.1840436979.

The spelling of 222747840 in words is "two hundred twenty-two million, seven hundred forty-seven thousand, eight hundred forty".