123400140 has 48 divisors (see below), whose sum is σ = 346574592. Its totient is φ = 32806336.

The previous prime is 123400111. The next prime is 123400157. The reversal of 123400140 is 41004321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17857 + ... + 23783.

It is an arithmetic number, because the mean of its divisors is an integer number (7220304).

Almost surely, 2^123400140 is an apocalyptic number.

123400140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123400140 is an abundant number, since it is smaller than the sum of its proper divisors (223174452).

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

123400140 is a wasteful number, since it uses less digits than its factorization.

123400140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6286 (or 6284 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 123400140 is about 11108.5615630468. The cubic root of 123400140 is about 497.8576874366.

Adding to 123400140 its reverse (41004321), we get a palindrome (164404461).

The spelling of 123400140 in words is "one hundred twenty-three million, four hundred thousand, one hundred forty".