123340431032 has 128 divisors (see below), whose sum is σ = 290334844800. Its totient is φ = 47818487808.

The previous prime is 123340431017. The next prime is 123340431059. The reversal of 123340431032 is 230134043321.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 123340430992 and 123340431010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55135418 + ... + 55137654.

It is an arithmetic number, because the mean of its divisors is an integer number (2268240975).

Almost surely, 2^123340431032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123340431032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145167422400).

123340431032 is an abundant number, since it is smaller than the sum of its proper divisors (166994413768).

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

123340431032 is a wasteful number, since it uses less digits than its factorization.

123340431032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745 (or 3741 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 123340431032 its reverse (230134043321), we get a palindrome (353474474353).

The spelling of 123340431032 in words is "one hundred twenty-three billion, three hundred forty million, four hundred thirty-one thousand, thirty-two".