1217972448 has 216 divisors, whose sum is σ = 4351851504. Its totient is φ = 316293120.

The previous prime is 1217972443. The next prime is 1217972471. The reversal of 1217972448 is 8442797121.

It is a super-2 number, since 2×1217972448² = 2966913768174225408, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217972443) 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 35 ways as a sum of consecutive naturals, for example, 241440 + ... + 246432.

Almost surely, 2^1217972448 is an apocalyptic number.

1217972448 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 1217972448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2175925752).

1217972448 is an abundant number, since it is smaller than the sum of its proper divisors (3133879056).

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

1217972448 is a wasteful number, since it uses less digits than its factorization.

1217972448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038 (or 5016 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1217972448 is about 34899.4620015839. The cubic root of 1217972448 is about 1067.9374621463.

The spelling of 1217972448 in words is "one billion, two hundred seventeen million, nine hundred seventy-two thousand, four hundred forty-eight".