123040440 has 96 divisors (see below), whose sum is σ = 403088400. Its totient is φ = 32547840.

The previous prime is 123040433. The next prime is 123040459. The reversal of 123040440 is 44040321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45856 + ... + 48464.

Almost surely, 2^123040440 is an apocalyptic number.

123040440 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 123040440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201544200).

123040440 is an abundant number, since it is smaller than the sum of its proper divisors (280047960).

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

123040440 is a wasteful number, since it uses less digits than its factorization.

123040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757 (or 2750 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 123040440 is about 11092.3595325792. The cubic root of 123040440 is about 497.3734802808.

Adding to 123040440 its reverse (44040321), we get a palindrome (167080761).

The spelling of 123040440 in words is "one hundred twenty-three million, forty thousand, four hundred forty".