220326440 has 32 divisors (see below), whose sum is σ = 498718080. Its totient is φ = 87600192.

The previous prime is 220326439. The next prime is 220326461. The reversal of 220326440 is 44623022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9812 + ... + 23171.

It is an arithmetic number, because the mean of its divisors is an integer number (15584940).

Almost surely, 2^220326440 is an apocalyptic number.

220326440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220326440 is an abundant number, since it is smaller than the sum of its proper divisors (278391640).

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

220326440 is a wasteful number, since it uses less digits than its factorization.

220326440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33161 (or 33157 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 220326440 is about 14843.3971852807. The cubic root of 220326440 is about 603.9795104375.

Adding to 220326440 its reverse (44623022), we get a palindrome (264949462).

The spelling of 220326440 in words is "two hundred twenty million, three hundred twenty-six thousand, four hundred forty".