123439104 has 144 divisors (see below), whose sum is σ = 368173260. Its totient is φ = 39813120.

The previous prime is 123439097. The next prime is 123439153. The reversal of 123439104 is 401934321.

123439104 is a `hidden beast` number, since 123 + 439 + 104 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 121881600 + 1557504 = 11040^2 + 1248^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681894 + ... + 682074.

Almost surely, 2^123439104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123439104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184086630).

123439104 is an abundant number, since it is smaller than the sum of its proper divisors (244734156).

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

123439104 is a wasteful number, since it uses less digits than its factorization.

123439104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 123439104 is about 11110.3152070497. The cubic root of 123439104 is about 497.9100819898.

The spelling of 123439104 in words is "one hundred twenty-three million, four hundred thirty-nine thousand, one hundred four".