123440500 has 48 divisors (see below), whose sum is σ = 270885888. Its totient is φ = 49140000.

The previous prime is 123440491. The next prime is 123440507. The reversal of 123440500 is 5044321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123440507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135045 + ... + 135955.

It is an arithmetic number, because the mean of its divisors is an integer number (5643456).

Almost surely, 2^123440500 is an apocalyptic number.

123440500 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 123440500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135442944).

123440500 is an abundant number, since it is smaller than the sum of its proper divisors (147445388).

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

123440500 is a wasteful number, since it uses less digits than its factorization.

123440500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 123440500 is about 11110.3780313723. The cubic root of 123440500 is about 497.9119589743.

Adding to 123440500 its reverse (5044321), we get a palindrome (128484821).

The spelling of 123440500 in words is "one hundred twenty-three million, four hundred forty thousand, five hundred".