220440440 has 32 divisors (see below), whose sum is σ = 541082160. Its totient is φ = 80160000.

The previous prime is 220440431. The next prime is 220440449. The reversal of 220440440 is 44044022.

220440440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (220440431) and next prime (220440449).

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220440449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250061 + ... + 250940.

Almost surely, 2^220440440 is an apocalyptic number.

220440440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220440440 is an abundant number, since it is smaller than the sum of its proper divisors (320641720).

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

220440440 is a wasteful number, since it uses less digits than its factorization.

220440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501023 (or 501019 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 220440440 is about 14847.2367799534. The cubic root of 220440440 is about 604.0836616420.

Adding to 220440440 its reverse (44044022), we get a palindrome (264484462).

The spelling of 220440440 in words is "two hundred twenty million, four hundred forty thousand, four hundred forty".