123489312 has 48 divisors (see below), whose sum is σ = 324741312. Its totient is φ = 41089280.

The previous prime is 123489307. The next prime is 123489371. The reversal of 123489312 is 213984321.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×123489312² = 30499220356466688, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 89653 + ... + 91019.

It is an arithmetic number, because the mean of its divisors is an integer number (6765444).

Almost surely, 2^123489312 is an apocalyptic number.

123489312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123489312 is an abundant number, since it is smaller than the sum of its proper divisors (201252000).

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

123489312 is a wasteful number, since it uses less digits than its factorization.

123489312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321 (or 2313 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 123489312 is about 11112.5744991878. The cubic root of 123489312 is about 497.9775799974.

The spelling of 123489312 in words is "one hundred twenty-three million, four hundred eighty-nine thousand, three hundred twelve".