870856443 has 6 divisors (see below), whose sum is σ = 1257903764. Its totient is φ = 580570956.

The previous prime is 870856423. The next prime is 870856453. The reversal of 870856443 is 344658078.

870856443 is a `hidden beast` number, since 87 + 0 + 8 + 564 + 4 + 3 = 666.

It is not a de Polignac number, because 870856443 - 2¹⁷ = 870725371 is a prime.

It is a super-2 number, since 2×870856443² = 1516781888629224498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870856423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48380905 + ... + 48380922.

Almost surely, 2^870856443 is an apocalyptic number.

870856443 is a deficient number, since it is larger than the sum of its proper divisors (387047321).

870856443 is a wasteful number, since it uses less digits than its factorization.

870856443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96761833 (or 96761830 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 870856443 is about 29510.2769048344. The cubic root of 870856443 is about 954.9534229817.

It can be divided in two parts, 87085 and 6443, that added together give a triangular number (93528 = T₄₃₂).

The spelling of 870856443 in words is "eight hundred seventy million, eight hundred fifty-six thousand, four hundred forty-three".