12897434448 has 120 divisors (see below), whose sum is σ = 37172371808. Its totient is φ = 4172103936.

The previous prime is 12897434447. The next prime is 12897434449. The reversal of 12897434448 is 84443479821.

12897434448 is a `hidden beast` number, since 128 + 9 + 74 + 3 + 4 + 448 = 666.

It is an interprime number because it is at equal distance from previous prime (12897434447) and next prime (12897434449).

It is a junction number, because it is equal to n+sod(n) for n = 12897434394 and 12897434403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12897434443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 965511 + ... + 978777.

Almost surely, 2^12897434448 is an apocalyptic number.

12897434448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12897434448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18586185904).

12897434448 is an abundant number, since it is smaller than the sum of its proper divisors (24274937360).

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

12897434448 is a wasteful number, since it uses less digits than its factorization.

12897434448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13481 (or 13472 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The spelling of 12897434448 in words is "twelve billion, eight hundred ninety-seven million, four hundred thirty-four thousand, four hundred forty-eight".