123406528 has 28 divisors (see below), whose sum is σ = 279869392. Its totient is φ = 52888320.

The previous prime is 123406511. The next prime is 123406529. The reversal of 123406528 is 825604321.

It is a tau number, because it is divible by the number of its divisors (28).

It is a self number, because there is not a number n which added to its sum of digits gives 123406528.

It is not an unprimeable number, because it can be changed into a prime (123406529) 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 in 3 ways as a sum of consecutive naturals, for example, 137283 + ... + 138178.

Almost surely, 2^123406528 is an apocalyptic number.

It is an amenable number.

123406528 is an abundant number, since it is smaller than the sum of its proper divisors (156462864).

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

123406528 is an equidigital number, since it uses as much as digits as its factorization.

123406528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275480 (or 275470 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 123406528 is about 11108.8490853013. The cubic root of 123406528 is about 497.8662780807.

The spelling of 123406528 in words is "one hundred twenty-three million, four hundred six thousand, five hundred twenty-eight".