123340420 has 24 divisors (see below), whose sum is σ = 296017344. Its totient is φ = 42288096.

The previous prime is 123340411. The next prime is 123340471. The reversal of 123340420 is 24043321.

It is an unprimeable number.

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, 440362 + ... + 440641.

It is an arithmetic number, because the mean of its divisors is an integer number (12334056).

Almost surely, 2^123340420 is an apocalyptic number.

123340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123340420 is an abundant number, since it is smaller than the sum of its proper divisors (172676924).

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

123340420 is a wasteful number, since it uses less digits than its factorization.

123340420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881019 (or 881017 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 123340420 is about 11105.8732209584. The cubic root of 123340420 is about 497.7773610591. Note that the first 3 decimals are identical.

Adding to 123340420 its reverse (24043321), we get a palindrome (147383741).

The spelling of 123340420 in words is "one hundred twenty-three million, three hundred forty thousand, four hundred twenty".