971218944 has 112 divisors (see below), whose sum is σ = 2878165440. Its totient is φ = 323665920.

The previous prime is 971218943. The next prime is 971218973. The reversal of 971218944 is 449812179.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 971218944.

It is not an unprimeable number, because it can be changed into a prime (971218943) 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, 218989 + ... + 223379.

Almost surely, 2^971218944 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 971218944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439082720).

971218944 is an abundant number, since it is smaller than the sum of its proper divisors (1906946496).

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

971218944 is an equidigital number, since it uses as much as digits as its factorization.

971218944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426 (or 4396 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 971218944 is about 31164.3858274152. The cubic root of 971218944 is about 990.3127753695.

The spelling of 971218944 in words is "nine hundred seventy-one million, two hundred eighteen thousand, nine hundred forty-four".