865448487 has 36 divisors (see below), whose sum is σ = 1292858424. Its totient is φ = 557837280.

The previous prime is 865448473. The next prime is 865448491. The reversal of 865448487 is 784844568.

865448487 is a `hidden beast` number, since 86 + 5 + 4 + 484 + 87 = 666.

It is not a de Polignac number, because 865448487 - 2¹⁰ = 865447463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865448417) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2179773 + ... + 2180169.

It is an arithmetic number, because the mean of its divisors is an integer number (35912734).

Almost surely, 2^865448487 is an apocalyptic number.

865448487 is a deficient number, since it is larger than the sum of its proper divisors (427409937).

865448487 is a wasteful number, since it uses less digits than its factorization.

865448487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 574 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 54.

The square root of 865448487 is about 29418.5058594076. The cubic root of 865448487 is about 952.9725862848.

The spelling of 865448487 in words is "eight hundred sixty-five million, four hundred forty-eight thousand, four hundred eighty-seven".