123208644 has 48 divisors (see below), whose sum is σ = 312016320. Its totient is φ = 37614720.

The previous prime is 123208583. The next prime is 123208651. The reversal of 123208644 is 446802321.

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 15 ways as a sum of consecutive naturals, for example, 17422 + ... + 23450.

It is an arithmetic number, because the mean of its divisors is an integer number (6500340).

Almost surely, 2^123208644 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 123208644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156008160).

123208644 is an abundant number, since it is smaller than the sum of its proper divisors (188807676).

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

123208644 is a wasteful number, since it uses less digits than its factorization.

123208644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180 (or 6178 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 123208644 is about 11099.9389187509. The cubic root of 123208644 is about 497.6000239951.

The spelling of 123208644 in words is "one hundred twenty-three million, two hundred eight thousand, six hundred forty-four".