123055660 has 108 divisors (see below), whose sum is σ = 325947888. Its totient is φ = 38892672.

The previous prime is 123055657. The next prime is 123055663. The reversal of 123055660 is 66550321.

It is an interprime number because it is at equal distance from previous prime (123055657) and next prime (123055663).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (123055663) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 165249 + ... + 165991.

It is an arithmetic number, because the mean of its divisors is an integer number (3018036).

Almost surely, 2^123055660 is an apocalyptic number.

123055660 is a gapful number since it is divisible by the number (10) 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 123055660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162973944).

123055660 is an abundant number, since it is smaller than the sum of its proper divisors (202892228).

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

123055660 is a wasteful number, since it uses less digits than its factorization.

123055660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 123055660 is about 11093.0455691843. The cubic root of 123055660 is about 497.3939876637.

The spelling of 123055660 in words is "one hundred twenty-three million, fifty-five thousand, six hundred sixty".