8640651 has 8 divisors (see below), whose sum is σ = 11635344. Its totient is φ = 5703200.

The previous prime is 8640601. The next prime is 8640679. The reversal of 8640651 is 1560468.

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

It is a cyclic number.

It is not a de Polignac number, because 8640651 - 2⁶ = 8640587 is a prime.

8640651 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8640601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13956 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (1454418).

Almost surely, 2^8640651 is an apocalyptic number.

8640651 is a deficient number, since it is larger than the sum of its proper divisors (2994693).

8640651 is a wasteful number, since it uses less digits than its factorization.

8640651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28621.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 8640651 is about 2939.4984266027. The cubic root of 8640651 is about 205.2022671493.

The spelling of 8640651 in words is "eight million, six hundred forty thousand, six hundred fifty-one".