123244140 has 24 divisors (see below), whose sum is σ = 345083760. Its totient is φ = 32865088.

The previous prime is 123244117. The next prime is 123244141. The reversal of 123244140 is 41442321.

It is not an unprimeable number, because it can be changed into a prime (123244141) 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, 1026975 + ... + 1027094.

It is an arithmetic number, because the mean of its divisors is an integer number (14378490).

Almost surely, 2^123244140 is an apocalyptic number.

123244140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123244140 is an abundant number, since it is smaller than the sum of its proper divisors (221839620).

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

123244140 is a wasteful number, since it uses less digits than its factorization.

123244140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054081 (or 2054079 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 123244140 is about 11101.5377313235. The cubic root of 123244140 is about 497.6478050435.

Adding to 123244140 its reverse (41442321), we get a palindrome (164686461).

The spelling of 123244140 in words is "one hundred twenty-three million, two hundred forty-four thousand, one hundred forty".