123428 has 12 divisors (see below), whose sum is σ = 220080. Its totient is φ = 60552.

The previous prime is 123427. The next prime is 123433. The reversal of 123428 is 824321.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (123427) 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, 26 + ... + 497.

It is an arithmetic number, because the mean of its divisors is an integer number (18340).

2¹²³⁴²⁸ is an apocalyptic number.

It is an amenable number.

123428 is a deficient number, since it is larger than the sum of its proper divisors (96652).

123428 is a wasteful number, since it uses less digits than its factorization.

123428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 584 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 123428 is about 351.3232130105. The cubic root of 123428 is about 49.7895151661.

Adding to 123428 its reverse (824321), we get a palindrome (947749).

The spelling of 123428 in words is "one hundred twenty-three thousand, four hundred twenty-eight".