12907998 has 80 divisors (see below), whose sum is σ = 31624560. Its totient is φ = 3919104.

The previous prime is 12907969. The next prime is 12908039. The reversal of 12907998 is 89970921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 118368 + ... + 118476.

It is an arithmetic number, because the mean of its divisors is an integer number (395307).

Almost surely, 2^12907998 is an apocalyptic number.

12907998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12907998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15812280).

12907998 is an abundant number, since it is smaller than the sum of its proper divisors (18716562).

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

12907998 is a wasteful number, since it uses less digits than its factorization.

12907998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 12907998 is about 3592.7702403577. The cubic root of 12907998 is about 234.5774692028.

The spelling of 12907998 in words is "twelve million, nine hundred seven thousand, nine hundred ninety-eight".