860643534 has 8 divisors (see below), whose sum is σ = 1721287080. Its totient is φ = 286881176.

The previous prime is 860643533. The next prime is 860643559. The reversal of 860643534 is 435346068.

It is a sphenic number, since it is the product of 3 distinct primes.

860643534 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 860643492 and 860643501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860643533) 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, 71720289 + ... + 71720300.

It is an arithmetic number, because the mean of its divisors is an integer number (215160885).

Almost surely, 2^860643534 is an apocalyptic number.

860643534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

860643534 is a wasteful number, since it uses less digits than its factorization.

860643534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143440594.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 860643534 is about 29336.7267090246. The cubic root of 860643534 is about 951.2056839435.

It can be divided in two parts, 86064 and 3534, that added together give a palindrome (89598).

The spelling of 860643534 in words is "eight hundred sixty million, six hundred forty-three thousand, five hundred thirty-four".