12978988 has 24 divisors (see below), whose sum is σ = 25041744. Its totient is φ = 5836800.

The previous prime is 12978983. The next prime is 12979027. The reversal of 12978988 is 88987921.

It is not an unprimeable number, because it can be changed into a prime (12978983) 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, 2748 + ... + 5788.

It is an arithmetic number, because the mean of its divisors is an integer number (1043406).

Almost surely, 2^12978988 is an apocalyptic number.

It is an amenable number.

12978988 is a deficient number, since it is larger than the sum of its proper divisors (12062756).

12978988 is a wasteful number, since it uses less digits than its factorization.

12978988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153 (or 3151 counting only the distinct ones).

The product of its digits is 580608, while the sum is 52.

The square root of 12978988 is about 3602.6362569652. The cubic root of 12978988 is about 235.0067177799.

The spelling of 12978988 in words is "twelve million, nine hundred seventy-eight thousand, nine hundred eighty-eight".