423784 has 8 divisors (see below), whose sum is σ = 794610. Its totient is φ = 211888.

The previous prime is 423781. The next prime is 423791. The reversal of 423784 is 487324.

It can be written as a sum of positive squares in only one way, i.e., 280900 + 142884 = 530^2 + 378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (423781) 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 as a sum of consecutive naturals, namely, 26479 + ... + 26494.

2⁴²³⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

423784 is a deficient number, since it is larger than the sum of its proper divisors (370826).

423784 is a wasteful number, since it uses less digits than its factorization.

423784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52979 (or 52975 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 423784 is about 650.9869430334. The cubic root of 423784 is about 75.1129557206.

The spelling of 423784 in words is "four hundred twenty-three thousand, seven hundred eighty-four".