123678340 has 12 divisors (see below), whose sum is σ = 259724556. Its totient is φ = 49471328.

The previous prime is 123678329. The next prime is 123678343. The reversal of 123678340 is 43876321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 96471684 + 27206656 = 9822^2 + 5216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123678296 and 123678305.

It is not an unprimeable number, because it can be changed into a prime (123678343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3091939 + ... + 3091978.

It is an arithmetic number, because the mean of its divisors is an integer number (21643713).

Almost surely, 2^123678340 is an apocalyptic number.

123678340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123678340 is an abundant number, since it is smaller than the sum of its proper divisors (136046216).

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

123678340 is a wasteful number, since it uses less digits than its factorization.

123678340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183926 (or 6183924 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 123678340 is about 11121.0763867532. The cubic root of 123678340 is about 498.2315391334.

The spelling of 123678340 in words is "one hundred twenty-three million, six hundred seventy-eight thousand, three hundred forty".