12926840 has 64 divisors (see below), whose sum is σ = 31168800. Its totient is φ = 4810752.

The previous prime is 12926831. The next prime is 12926857. The reversal of 12926840 is 4862921.

It is a junction number, because it is equal to n+sod(n) for n = 12926797 and 12926806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55364 + ... + 55596.

Almost surely, 2^12926840 is an apocalyptic number.

12926840 is a gapful number since it is divisible by the number (10) 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 12926840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15584400).

12926840 is an abundant number, since it is smaller than the sum of its proper divisors (18241960).

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

12926840 is a wasteful number, since it uses less digits than its factorization.

12926840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 12926840 is about 3595.3914946776. The cubic root of 12926840 is about 234.6915524716.

The spelling of 12926840 in words is "twelve million, nine hundred twenty-six thousand, eight hundred forty".