123280668 has 108 divisors (see below), whose sum is σ = 383920992. Its totient is φ = 33143040.

The previous prime is 123280643. The next prime is 123280679. The reversal of 123280668 is 866082321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27933 + ... + 32043.

It is an arithmetic number, because the mean of its divisors is an integer number (3554824).

Almost surely, 2^123280668 is an apocalyptic number.

123280668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123280668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191960496).

123280668 is an abundant number, since it is smaller than the sum of its proper divisors (260640324).

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

123280668 is a wasteful number, since it uses less digits than its factorization.

123280668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152 (or 4140 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 123280668 is about 11103.1827869310. The cubic root of 123280668 is about 497.6969656862.

The spelling of 123280668 in words is "one hundred twenty-three million, two hundred eighty thousand, six hundred sixty-eight".