12840436 has 24 divisors (see below), whose sum is σ = 25859456. Its totient is φ = 5464800.

The previous prime is 12840427. The next prime is 12840461. The reversal of 12840436 is 63404821.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2710 + ... + 5746.

Almost surely, 2^12840436 is an apocalyptic number.

It is an amenable number.

12840436 is an abundant number, since it is smaller than the sum of its proper divisors (13019020).

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

12840436 is a wasteful number, since it uses less digits than its factorization.

12840436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199 (or 3197 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 12840436 is about 3583.3554107847. The cubic root of 12840436 is about 234.1674842545.

The spelling of 12840436 in words is "twelve million, eight hundred forty thousand, four hundred thirty-six".