123878412924 has 72 divisors (see below), whose sum is σ = 336512610000. Its totient is φ = 35365284864.

The previous prime is 123878412893. The next prime is 123878412961. The reversal of 123878412924 is 429214878321.

It is a happy number.

It is a super-2 number, since 2×123878412924² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 650074 + ... + 818750.

It is an arithmetic number, because the mean of its divisors is an integer number (4673786250).

Almost surely, 2^123878412924 is an apocalyptic number.

123878412924 is a gapful number since it is divisible by the number (14) 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 123878412924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168256305000).

123878412924 is an abundant number, since it is smaller than the sum of its proper divisors (212634197076).

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

123878412924 is a wasteful number, since it uses less digits than its factorization.

123878412924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169947 (or 169938 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The spelling of 123878412924 in words is "one hundred twenty-three billion, eight hundred seventy-eight million, four hundred twelve thousand, nine hundred twenty-four".