123940544 has 84 divisors (see below), whose sum is σ = 304550064. Its totient is φ = 49001472.

The previous prime is 123940543. The next prime is 123940549. The reversal of 123940544 is 445049321.

It is a super-2 number, since 2×123940544² = 30722516894031872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 123940544.

It is not an unprimeable number, because it can be changed into a prime (123940543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74894 + ... + 76530.

It is an arithmetic number, because the mean of its divisors is an integer number (3625596).

Almost surely, 2^123940544 is an apocalyptic number.

123940544 is a gapful number since it is divisible by the number (14) 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 123940544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152275032).

123940544 is an abundant number, since it is smaller than the sum of its proper divisors (180609520).

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

123940544 is a wasteful number, since it uses less digits than its factorization.

123940544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 123940544 is about 11132.8587523601. The cubic root of 123940544 is about 498.5833821784.

Adding to 123940544 its reverse (445049321), we get a palindrome (568989865).

The spelling of 123940544 in words is "one hundred twenty-three million, nine hundred forty thousand, five hundred forty-four".