123120440 has 32 divisors (see below), whose sum is σ = 277400160. Its totient is φ = 49180800.

The previous prime is 123120427. The next prime is 123120479. The reversal of 123120440 is 44021321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36005 + ... + 39275.

It is an arithmetic number, because the mean of its divisors is an integer number (8668755).

Almost surely, 2^123120440 is an apocalyptic number.

123120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123120440 is an abundant number, since it is smaller than the sum of its proper divisors (154279720).

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

123120440 is a wasteful number, since it uses less digits than its factorization.

123120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4223 (or 4219 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 123120440 is about 11095.9650323890. The cubic root of 123120440 is about 497.4812531340.

Adding to 123120440 its reverse (44021321), we get a palindrome (167141761).

The spelling of 123120440 in words is "one hundred twenty-three million, one hundred twenty thousand, four hundred forty".