8705286644 has 6 divisors (see below), whose sum is σ = 15234251634. Its totient is φ = 4352643320.

The previous prime is 8705286643. The next prime is 8705286649. The reversal of 8705286644 is 4466825078.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8584022500 + 121264144 = 92650^2 + 11012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8705286592 and 8705286601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8705286643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1088160827 + ... + 1088160834.

It is an arithmetic number, because the mean of its divisors is an integer number (2539041939).

Almost surely, 2^8705286644 is an apocalyptic number.

It is an amenable number.

8705286644 is a deficient number, since it is larger than the sum of its proper divisors (6528964990).

8705286644 is a wasteful number, since it uses less digits than its factorization.

8705286644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176321665 (or 2176321663 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The square root of 8705286644 is about 93302.1256135143. The cubic root of 8705286644 is about 2057.1266254993.

The spelling of 8705286644 in words is "eight billion, seven hundred five million, two hundred eighty-six thousand, six hundred forty-four".