123400144 has 40 divisors (see below), whose sum is σ = 289320768. Its totient is φ = 49774080.

The previous prime is 123400111. The next prime is 123400157. The reversal of 123400144 is 441004321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30502 + ... + 34309.

Almost surely, 2^123400144 is an apocalyptic number.

123400144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

123400144 is an abundant number, since it is smaller than the sum of its proper divisors (165920624).

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

123400144 is a wasteful number, since it uses less digits than its factorization.

123400144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64843 (or 64837 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123400144 is about 11108.5617430881. The cubic root of 123400144 is about 497.8576928160.

Adding to 123400144 its reverse (441004321), we get a palindrome (564404465).

The spelling of 123400144 in words is "one hundred twenty-three million, four hundred thousand, one hundred forty-four".