123210340 has 24 divisors (see below), whose sum is σ = 282264192. Its totient is φ = 44803680.

The previous prime is 123210317. The next prime is 123210343. The reversal of 123210340 is 43012321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (123210343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279804 + ... + 280243.

It is an arithmetic number, because the mean of its divisors is an integer number (11761008).

Almost surely, 2^123210340 is an apocalyptic number.

123210340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123210340 is an abundant number, since it is smaller than the sum of its proper divisors (159053852).

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

123210340 is a wasteful number, since it uses less digits than its factorization.

123210340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560067 (or 560065 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123210340 is about 11100.0153153047. The cubic root of 123210340 is about 497.6023071839.

Adding to 123210340 its reverse (43012321), we get a palindrome (166222661).

The spelling of 123210340 in words is "one hundred twenty-three million, two hundred ten thousand, three hundred forty".