427827855 has 128 divisors (see below), whose sum is σ = 889878528. Its totient is φ = 170698752.

The previous prime is 427827817. The next prime is 427827857. The reversal of 427827855 is 558728724.

It is a Cunningham number, because it is equal to 20684²-1.

It is not a de Polignac number, because 427827855 - 2⁷ = 427827727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427827857) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 2171617 + ... + 2171813.

It is an arithmetic number, because the mean of its divisors is an integer number (6952176).

Almost surely, 2^427827855 is an apocalyptic number.

427827855 is an abundant number, since it is smaller than the sum of its proper divisors (462050673).

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

427827855 is a wasteful number, since it uses less digits than its factorization.

427827855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305.

The product of its digits is 1254400, while the sum is 48.

The square root of 427827855 is about 20683.9999758267. Note that the first 4 decimals coincide. The cubic root of 427827855 is about 753.5111545186.

The spelling of 427827855 in words is "four hundred twenty-seven million, eight hundred twenty-seven thousand, eight hundred fifty-five".