423428 has 12 divisors (see below), whose sum is σ = 761292. Its totient is φ = 205920.

The previous prime is 423427. The next prime is 423431. The reversal of 423428 is 824324.

It can be written as a sum of positive squares in 2 ways, for example, as 315844 + 107584 = 562^2 + 328^2 .

It is not an unprimeable number, because it can be changed into a prime (423427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283 + ... + 1578.

It is an arithmetic number, because the mean of its divisors is an integer number (63441).

2⁴²³⁴²⁸ is an apocalyptic number.

It is an amenable number.

423428 is a deficient number, since it is larger than the sum of its proper divisors (337864).

423428 is a wasteful number, since it uses less digits than its factorization.

423428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902 (or 2900 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 423428 is about 650.7134546019. The cubic root of 423428 is about 75.0919169340.

It can be divided in two parts, 4 and 23428, that added together give a palindrome (23432).

The spelling of 423428 in words is "four hundred twenty-three thousand, four hundred twenty-eight".