12840402 has 32 divisors (see below), whose sum is σ = 26528832. Its totient is φ = 4140864.

The previous prime is 12840391. The next prime is 12840427. The reversal of 12840402 is 20404821.

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, 40348 + ... + 40664.

It is an arithmetic number, because the mean of its divisors is an integer number (829026).

Almost surely, 2^12840402 is an apocalyptic number.

12840402 is an abundant number, since it is smaller than the sum of its proper divisors (13688430).

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

12840402 is a wasteful number, since it uses less digits than its factorization.

12840402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 12840402 is about 3583.3506666247. The cubic root of 12840402 is about 234.1672775714.

The spelling of 12840402 in words is "twelve million, eight hundred forty thousand, four hundred two".