12239856 has 80 divisors (see below), whose sum is σ = 36381600. Its totient is φ = 3935232.

The previous prime is 12239839. The next prime is 12239861. The reversal of 12239856 is 65893221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12239856.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12040 + ... + 13016.

It is an arithmetic number, because the mean of its divisors is an integer number (454770).

Almost surely, 2^12239856 is an apocalyptic number.

12239856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12239856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18190800).

12239856 is an abundant number, since it is smaller than the sum of its proper divisors (24141744).

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

12239856 is a wasteful number, since it uses less digits than its factorization.

12239856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 1011 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 12239856 is about 3498.5505570164. The cubic root of 12239856 is about 230.4581667376.

The spelling of 12239856 in words is "twelve million, two hundred thirty-nine thousand, eight hundred fifty-six".