12479840 has 24 divisors (see below), whose sum is σ = 29484000. Its totient is φ = 4991872.

The previous prime is 12479839. The next prime is 12479849. The reversal of 12479840 is 4897421.

It is a self number, because there is not a number n which added to its sum of digits gives 12479840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12479849) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 38840 + ... + 39159.

It is an arithmetic number, because the mean of its divisors is an integer number (1228500).

Almost surely, 2^12479840 is an apocalyptic number.

12479840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12479840 is an abundant number, since it is smaller than the sum of its proper divisors (17004160).

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

12479840 is an equidigital number, since it uses as much as digits as its factorization.

12479840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78014 (or 78006 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 12479840 is about 3532.6817009179. The cubic root of 12479840 is about 231.9546086385.

The spelling of 12479840 in words is "twelve million, four hundred seventy-nine thousand, eight hundred forty".