123403140 has 144 divisors (see below), whose sum is σ = 439525632. Its totient is φ = 27433728.

The previous prime is 123403129. The next prime is 123403171. The reversal of 123403140 is 41304321.

123403140 is a `hidden beast` number, since 12 + 340 + 314 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45297 + ... + 47943.

Almost surely, 2^123403140 is an apocalyptic number.

123403140 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 123403140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219762816).

123403140 is an abundant number, since it is smaller than the sum of its proper divisors (316122492).

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

123403140 is a wasteful number, since it uses less digits than its factorization.

123403140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706 (or 2701 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123403140 is about 11108.6965932102. The cubic root of 123403140 is about 497.8617219025.

Adding to 123403140 its reverse (41304321), we get a palindrome (164707461).

The spelling of 123403140 in words is "one hundred twenty-three million, four hundred three thousand, one hundred forty".