123828734689850 has 48 divisors (see below), whose sum is σ = 243872188466688. Its totient is φ = 46617413687040.

The previous prime is 123828734689843. The next prime is 123828734690047. The reversal of 123828734689850 is 58986437828321.

It is a happy number.

It is a super-3 number, since 3×123828734689850³ (a number of 43 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (74) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91902119 + ... + 93239781.

It is an arithmetic number, because the mean of its divisors is an integer number (5080670593056).

It is a 1-persistent number, because it is pandigital, but 2⋅123828734689850 = 247657469379700 is not.

Almost surely, 2^{123828734689850} is an apocalyptic number.

123828734689850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123828734689850 is a deficient number, since it is larger than the sum of its proper divisors (120043453776838).

123828734689850 is a wasteful number, since it uses less digits than its factorization.

123828734689850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446599 (or 1446594 counting only the distinct ones).

The product of its (nonzero) digits is 1114767360, while the sum is 74.

The spelling of 123828734689850 in words is "one hundred twenty-three trillion, eight hundred twenty-eight billion, seven hundred thirty-four million, six hundred eighty-nine thousand, eight hundred fifty".