8640712 has 8 divisors (see below), whose sum is σ = 16201350. Its totient is φ = 4320352.

The previous prime is 8640707. The next prime is 8640713. The reversal of 8640712 is 2170468.

It can be written as a sum of positive squares in only one way, i.e., 6584356 + 2056356 = 2566^2 + 1434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8640713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540037 + ... + 540052.

Almost surely, 2^8640712 is an apocalyptic number.

It is an amenable number.

8640712 is a deficient number, since it is larger than the sum of its proper divisors (7560638).

8640712 is a wasteful number, since it uses less digits than its factorization.

8640712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080095 (or 1080091 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 8640712 is about 2939.5088025043. The cubic root of 8640712 is about 205.2027500338.

It can be divided in two parts, 8 and 640712, that multiplied together give a square (5125696 = 2264²).

The spelling of 8640712 in words is "eight million, six hundred forty thousand, seven hundred twelve".