870448871 has 4 divisors (see below), whose sum is σ = 890691912. Its totient is φ = 850205832.

The previous prime is 870448847. The next prime is 870448877. The reversal of 870448871 is 178844078.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870448871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870448877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10121456 + ... + 10121541.

It is an arithmetic number, because the mean of its divisors is an integer number (222672978).

Almost surely, 2^870448871 is an apocalyptic number.

870448871 is a deficient number, since it is larger than the sum of its proper divisors (20243041).

870448871 is a wasteful number, since it uses less digits than its factorization.

870448871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20243040.

The product of its (nonzero) digits is 401408, while the sum is 47.

The square root of 870448871 is about 29503.3705023680. The cubic root of 870448871 is about 954.8044229124.

It can be divided in two parts, 8704 and 48871, that added together give a palindrome (57575).

The spelling of 870448871 in words is "eight hundred seventy million, four hundred forty-eight thousand, eight hundred seventy-one".