427788166 has 32 divisors (see below), whose sum is σ = 717792768. Its totient is φ = 189937440.

The previous prime is 427788161. The next prime is 427788199. The reversal of 427788166 is 661887724.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427788161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72051 + ... + 77761.

It is an arithmetic number, because the mean of its divisors is an integer number (22431024).

Almost surely, 2^427788166 is an apocalyptic number.

427788166 is a deficient number, since it is larger than the sum of its proper divisors (290004602).

427788166 is a wasteful number, since it uses less digits than its factorization.

427788166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836.

The product of its digits is 903168, while the sum is 49.

The square root of 427788166 is about 20683.0405405008. The cubic root of 427788166 is about 753.4878530679.

The spelling of 427788166 in words is "four hundred twenty-seven million, seven hundred eighty-eight thousand, one hundred sixty-six".