123312028 has 18 divisors (see below), whose sum is σ = 251028456. Its totient is φ = 52847928.

The previous prime is 123312023. The next prime is 123312029. The reversal of 123312028 is 820213321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 314376 + ... + 314767.

Almost surely, 2^123312028 is an apocalyptic number.

It is an amenable number.

123312028 is an abundant number, since it is smaller than the sum of its proper divisors (127716428).

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

123312028 is a wasteful number, since it uses less digits than its factorization.

123312028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629161 (or 629152 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 123312028 is about 11104.5949048131. The cubic root of 123312028 is about 497.7391633096.

Adding to 123312028 its reverse (820213321), we get a palindrome (943525349).

The spelling of 123312028 in words is "one hundred twenty-three million, three hundred twelve thousand, twenty-eight".