12840670 has 16 divisors (see below), whose sum is σ = 24118560. Its totient is φ = 4912864.

The previous prime is 12840643. The next prime is 12840677. The reversal of 12840670 is 7604821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27685 + ... + 28144.

It is an arithmetic number, because the mean of its divisors is an integer number (1507410).

Almost surely, 2^12840670 is an apocalyptic number.

12840670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12840670 is a deficient number, since it is larger than the sum of its proper divisors (11277890).

12840670 is a wasteful number, since it uses less digits than its factorization.

12840670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55859.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 12840670 is about 3583.3880615976. The cubic root of 12840670 is about 234.1689067103.

The spelling of 12840670 in words is "twelve million, eight hundred forty thousand, six hundred seventy".