123218580 has 24 divisors (see below), whose sum is σ = 345012192. Its totient is φ = 32858272.

The previous prime is 123218573. The next prime is 123218581. The reversal of 123218580 is 85812321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123218581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026762 + ... + 1026881.

It is an arithmetic number, because the mean of its divisors is an integer number (14375508).

Almost surely, 2^123218580 is an apocalyptic number.

123218580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123218580 is an abundant number, since it is smaller than the sum of its proper divisors (221793612).

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

123218580 is a wasteful number, since it uses less digits than its factorization.

123218580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053655 (or 2053653 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 123218580 is about 11100.3864797583. The cubic root of 123218580 is about 497.6133997367.

The spelling of 123218580 in words is "one hundred twenty-three million, two hundred eighteen thousand, five hundred eighty".