220838427 has 8 divisors (see below), whose sum is σ = 327168080. Its totient is φ = 147225600.

The previous prime is 220838399. The next prime is 220838447. The reversal of 220838427 is 724838022.

220838427 is a `hidden beast` number, since 220 + 8 + 3 + 8 + 427 = 666.

It is not a de Polignac number, because 220838427 - 2⁶ = 220838363 is a prime.

It is a super-2 number, since 2×220838427² = 97539221679668658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220838391 and 220838400.

It is not an unprimeable number, because it can be changed into a prime (220838447) 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, 4089574 + ... + 4089627.

It is an arithmetic number, because the mean of its divisors is an integer number (40896010).

Almost surely, 2^220838427 is an apocalyptic number.

220838427 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

220838427 is a deficient number, since it is larger than the sum of its proper divisors (106329653).

220838427 is an equidigital number, since it uses as much as digits as its factorization.

220838427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8179210 (or 8179204 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 220838427 is about 14860.6334656367. The cubic root of 220838427 is about 604.4469841258.

The spelling of 220838427 in words is "two hundred twenty million, eight hundred thirty-eight thousand, four hundred twenty-seven".