220404260 has 12 divisors (see below), whose sum is σ = 462848988. Its totient is φ = 88161696.

The previous prime is 220404251. The next prime is 220404277. The reversal of 220404260 is 62404022.

It can be written as a sum of positive squares in 2 ways, for example, as 137921536 + 82482724 = 11744^2 + 9082^2 .

It is a super-2 number, since 2×220404260² = 97156075652295200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11020213 = 220404260 / (2 + 2 + 0 + 4 + 0 + 4 + 2 + 6 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5510087 + ... + 5510126.

It is an arithmetic number, because the mean of its divisors is an integer number (38570749).

Almost surely, 2^220404260 is an apocalyptic number.

220404260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220404260 is an abundant number, since it is smaller than the sum of its proper divisors (242444728).

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

220404260 is a wasteful number, since it uses less digits than its factorization.

220404260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020222 (or 11020220 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 220404260 is about 14846.0183214221. The cubic root of 220404260 is about 604.0506112291.

Adding to 220404260 its reverse (62404022), we get a palindrome (282808282).

The spelling of 220404260 in words is "two hundred twenty million, four hundred four thousand, two hundred sixty".