865064448 has 240 divisors, whose sum is σ = 2748105360. Its totient is φ = 270729216.

The previous prime is 865064441. The next prime is 865064449. The reversal of 865064448 is 844460568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865064441) 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, 2114868 + ... + 2115276.

It is an arithmetic number, because the mean of its divisors is an integer number (11450439).

Almost surely, 2^865064448 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 865064448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374052680).

865064448 is an abundant number, since it is smaller than the sum of its proper divisors (1883040912).

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

865064448 is an equidigital number, since it uses as much as digits as its factorization.

865064448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 865064448 is about 29411.9779681680. The cubic root of 865064448 is about 952.8316062836.

The spelling of 865064448 in words is "eight hundred sixty-five million, sixty-four thousand, four hundred forty-eight".