12880918 has 4 divisors (see below), whose sum is σ = 19321380. Its totient is φ = 6440458.

The previous prime is 12880913. The next prime is 12880919. The reversal of 12880918 is 81908821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81908821 = 107 ⋅765503.

It is a super-3 number, since 3×12880918³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12880913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220228 + ... + 3220231.

It is an arithmetic number, because the mean of its divisors is an integer number (4830345).

Almost surely, 2^12880918 is an apocalyptic number.

12880918 is a deficient number, since it is larger than the sum of its proper divisors (6440462).

12880918 is an equidigital number, since it uses as much as digits as its factorization.

12880918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6440461.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 12880918 is about 3588.9995820563. Note that the first 3 decimals coincide. The cubic root of 12880918 is about 234.4133124450.

The spelling of 12880918 in words is "twelve million, eight hundred eighty thousand, nine hundred eighteen".