13431856 has 10 divisors (see below), whose sum is σ = 26024252. Its totient is φ = 6715920.

The previous prime is 13431811. The next prime is 13431857. The reversal of 13431856 is 65813431.

It is not an unprimeable number, because it can be changed into a prime (13431857) 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 as a sum of consecutive naturals, namely, 419730 + ... + 419761.

Almost surely, 2^13431856 is an apocalyptic number.

13431856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13431856 is a deficient number, since it is larger than the sum of its proper divisors (12592396).

13431856 is an equidigital number, since it uses as much as digits as its factorization.

13431856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839499 (or 839493 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 13431856 is about 3664.9496585901. The cubic root of 13431856 is about 237.7088452919.

The spelling of 13431856 in words is "thirteen million, four hundred thirty-one thousand, eight hundred fifty-six".