12991896 has 48 divisors (see below), whose sum is σ = 37042200. Its totient is φ = 4102272.

The previous prime is 12991879. The next prime is 12991931. The reversal of 12991896 is 69819921.

12991896 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3381 + ... + 6116.

Almost surely, 2^12991896 is an apocalyptic number.

It is an amenable number.

12991896 is an abundant number, since it is smaller than the sum of its proper divisors (24050304).

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

12991896 is a wasteful number, since it uses less digits than its factorization.

12991896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9528 (or 9521 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 12991896 is about 3604.4272776684. The cubic root of 12991896 is about 235.0845990868.

The spelling of 12991896 in words is "twelve million, nine hundred ninety-one thousand, eight hundred ninety-six".