12991088 has 40 divisors (see below), whose sum is σ = 27664896. Its totient is φ = 5860800.

The previous prime is 12991087. The next prime is 12991103. The reversal of 12991088 is 88019921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12991087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39083 + ... + 39413.

Almost surely, 2^12991088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12991088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13832448).

12991088 is an abundant number, since it is smaller than the sum of its proper divisors (14673808).

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

12991088 is a wasteful number, since it uses less digits than its factorization.

12991088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 12991088 is about 3604.3151915447. The cubic root of 12991088 is about 235.0797254770.

The spelling of 12991088 in words is "twelve million, nine hundred ninety-one thousand, eighty-eight".