427784 has 16 divisors (see below), whose sum is σ = 916800. Its totient is φ = 183312.

The previous prime is 427781. The next prime is 427787. The reversal of 427784 is 487724.

It is an interprime number because it is at equal distance from previous prime (427781) and next prime (427787).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 427784.

It is not an unprimeable number, because it can be changed into a prime (427781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3764 + ... + 3875.

It is an arithmetic number, because the mean of its divisors is an integer number (57300).

2⁴²⁷⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

427784 is an abundant number, since it is smaller than the sum of its proper divisors (489016).

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

427784 is a wasteful number, since it uses less digits than its factorization.

427784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7652 (or 7648 counting only the distinct ones).

The product of its digits is 12544, while the sum is 32.

The square root of 427784 is about 654.0519857014. The cubic root of 427784 is about 75.3485407122.

The spelling of 427784 in words is "four hundred twenty-seven thousand, seven hundred eighty-four".