12417217428 has 96 divisors (see below), whose sum is σ = 36362446848. Its totient is φ = 3203856000.

The previous prime is 12417217409. The next prime is 12417217429. The reversal of 12417217428 is 82471271421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12417217429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95026 + ... + 184022.

It is an arithmetic number, because the mean of its divisors is an integer number (378775488).

Almost surely, 2^12417217428 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 12417217428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18181223424).

12417217428 is an abundant number, since it is smaller than the sum of its proper divisors (23945229420).

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

12417217428 is a wasteful number, since it uses less digits than its factorization.

12417217428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89173 (or 89171 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

Adding to 12417217428 its reverse (82471271421), we get a palindrome (94888488849).

The spelling of 12417217428 in words is "twelve billion, four hundred seventeen million, two hundred seventeen thousand, four hundred twenty-eight".