220520340 has 96 divisors (see below), whose sum is σ = 702092160. Its totient is φ = 57431808.

The previous prime is 220520309. The next prime is 220520351. The reversal of 220520340 is 43025022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18472 + ... + 27968.

It is an arithmetic number, because the mean of its divisors is an integer number (7313460).

Almost surely, 2^220520340 is an apocalyptic number.

220520340 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 220520340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351046080).

220520340 is an abundant number, since it is smaller than the sum of its proper divisors (481571820).

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

220520340 is a wasteful number, since it uses less digits than its factorization.

220520340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9558 (or 9550 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 220520340 is about 14849.9272725492. The cubic root of 220520340 is about 604.1566374448.

Adding to 220520340 its reverse (43025022), we get a palindrome (263545362).

The spelling of 220520340 in words is "two hundred twenty million, five hundred twenty thousand, three hundred forty".