220343240 has 64 divisors (see below), whose sum is σ = 535550400. Its totient is φ = 81107712.

The previous prime is 220343231. The next prime is 220343261. The reversal of 220343240 is 42343022.

220343240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×220343240² = 97102286827395200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334031 + ... + 334689.

It is an arithmetic number, because the mean of its divisors is an integer number (8367975).

Almost surely, 2^220343240 is an apocalyptic number.

220343240 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 220343240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267775200).

220343240 is an abundant number, since it is smaller than the sum of its proper divisors (315207160).

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

220343240 is a wasteful number, since it uses less digits than its factorization.

220343240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 220343240 is about 14843.9630826811. The cubic root of 220343240 is about 603.9948612928.

Adding to 220343240 its reverse (42343022), we get a palindrome (262686262).

The spelling of 220343240 in words is "two hundred twenty million, three hundred forty-three thousand, two hundred forty".