123343240 has 16 divisors (see below), whose sum is σ = 277522380. Its totient is φ = 49337280.

The previous prime is 123343183. The next prime is 123343247. The reversal of 123343240 is 42343321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123343236 + 4 = 11106^2 + 2^2 .

It is not an unprimeable number, because it can be changed into a prime (123343247) 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 3 ways as a sum of consecutive naturals, for example, 1541751 + ... + 1541830.

Almost surely, 2^123343240 is an apocalyptic number.

123343240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123343240 is an abundant number, since it is smaller than the sum of its proper divisors (154179140).

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

123343240 is a wasteful number, since it uses less digits than its factorization.

123343240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083592 (or 3083588 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 123343240 is about 11106.0001800828. Note that the first 3 decimals coincide. The cubic root of 123343240 is about 497.7811546829.

Adding to 123343240 its reverse (42343321), we get a palindrome (165686561).

The spelling of 123343240 in words is "one hundred twenty-three million, three hundred forty-three thousand, two hundred forty".