865242224 has 80 divisors (see below), whose sum is σ = 2101579776. Its totient is φ = 335251200.

The previous prime is 865242211. The next prime is 865242227. The reversal of 865242224 is 422242568.

It is a Cunningham number, because it is equal to 29415²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865242227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233474 + ... + 237150.

Almost surely, 2^865242224 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 865242224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050789888).

865242224 is an abundant number, since it is smaller than the sum of its proper divisors (1236337552).

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

865242224 is a wasteful number, since it uses less digits than its factorization.

865242224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894 (or 3888 counting only the distinct ones).

The product of its digits is 61440, while the sum is 35.

The square root of 865242224 is about 29414.9999830019. Note that the first 4 decimals coincide. The cubic root of 865242224 is about 952.8968727077.

The spelling of 865242224 in words is "eight hundred sixty-five million, two hundred forty-two thousand, two hundred twenty-four".