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220440220 = 22572113132
BaseRepresentation
bin11010010001110…
…10011010011100
3120100210112010121
431020322122130
5422413041340
633512444324
75314465600
oct1510723234
9510715117
10220440220
11103484000
12619a96a4
1336892c00
14213c3500
151454594a
hexd23a69c

220440220 has 216 divisors, whose sum is σ = 641381328. Its totient is φ = 63423360.

The previous prime is 220440203. The next prime is 220440229. The reversal of 220440220 is 22044022.

220440220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 220440194 and 220440203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220440229) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16956934 + ... + 16956946.

It is an arithmetic number, because the mean of its divisors is an integer number (2969358).

Almost surely, 2220440220 is an apocalyptic number.

220440220 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 220440220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320690664).

220440220 is an abundant number, since it is smaller than the sum of its proper divisors (420941108).

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

220440220 is a wasteful number, since it uses less digits than its factorization.

220440220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 220440220 is about 14847.2293711655. The cubic root of 220440220 is about 604.0834606830.

Adding to 220440220 its reverse (22044022), we get a palindrome (242484242).

It can be divided in two parts, 2204 and 40220, that added together give a palindrome (42424).

The spelling of 220440220 in words is "two hundred twenty million, four hundred forty thousand, two hundred twenty".