12939810 has 32 divisors (see below), whose sum is σ = 33445440. Its totient is φ = 3185088.

The previous prime is 12939793. The next prime is 12939811. The reversal of 12939810 is 1893921.

It is a super-2 number, since 2×12939810² = 334877365672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12939811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16200 + ... + 16979.

It is an arithmetic number, because the mean of its divisors is an integer number (1045170).

Almost surely, 2^12939810 is an apocalyptic number.

12939810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12939810 is an abundant number, since it is smaller than the sum of its proper divisors (20505630).

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

12939810 is a wasteful number, since it uses less digits than its factorization.

12939810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33202.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12939810 is about 3597.1947403498. The cubic root of 12939810 is about 234.7700179477.

The spelling of 12939810 in words is "twelve million, nine hundred thirty-nine thousand, eight hundred ten".