13423720 has 32 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 5135680.

The previous prime is 13423699. The next prime is 13423763. The reversal of 13423720 is 2732431.

It is a junction number, because it is equal to n+sod(n) for n = 13423691 and 13423700.

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, 6376 + ... + 8215.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^13423720 is an apocalyptic number.

13423720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13423720 is an abundant number, since it is smaller than the sum of its proper divisors (18095000).

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

13423720 is a wasteful number, since it uses less digits than its factorization.

13423720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14625 (or 14621 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 13423720 is about 3663.8395161360. The cubic root of 13423720 is about 237.6608402660.

The spelling of 13423720 in words is "thirteen million, four hundred twenty-three thousand, seven hundred twenty".