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BaseRepresentation
bin110110011000111100
3102022121010
4312120330
524112110
64435220
71615335
oct663074
9368533
10222780
11142418
12a8b10
137a52c
145b28c
1546020
hex3663c

222780 has 48 divisors (see below), whose sum is σ = 645120. Its totient is φ = 57408.

The previous prime is 222779. The next prime is 222787. The reversal of 222780 is 87222.

222780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2781 + ... + 2859.

It is an arithmetic number, because the mean of its divisors is an integer number (13440).

2222780 is an apocalyptic number.

222780 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 222780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322560).

222780 is an abundant number, since it is smaller than the sum of its proper divisors (422340).

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

222780 is a wasteful number, since it uses less digits than its factorization.

222780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 222780 is about 471.9957626928. The cubic root of 222780 is about 60.6213215609.

The spelling of 222780 in words is "two hundred twenty-two thousand, seven hundred eighty".