123840729486 has 48 divisors (see below), whose sum is σ = 274085757504. Its totient is φ = 40393801152.

The previous prime is 123840729433. The next prime is 123840729487. The reversal of 123840729486 is 684927048321.

123840729486 is a `hidden beast` number, since 1 + 238 + 40 + 7 + 294 + 86 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123840729487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5332596 + ... + 5355768.

It is an arithmetic number, because the mean of its divisors is an integer number (5710119948).

Almost surely, 2^123840729486 is an apocalyptic number.

123840729486 is an abundant number, since it is smaller than the sum of its proper divisors (150245028018).

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

123840729486 is a wasteful number, since it uses less digits than its factorization.

123840729486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29545 (or 29542 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 123840729486 in words is "one hundred twenty-three billion, eight hundred forty million, seven hundred twenty-nine thousand, four hundred eighty-six".