8641970 has 16 divisors (see below), whose sum is σ = 15626520. Its totient is φ = 3441024.

The previous prime is 8641957. The next prime is 8641987. The reversal of 8641970 is 791468.

It can be written as a sum of positive squares in 4 ways, for example, as 4669921 + 3972049 = 2161^2 + 1993^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8641970.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 4184.

Almost surely, 2^8641970 is an apocalyptic number.

8641970 is a deficient number, since it is larger than the sum of its proper divisors (6984550).

8641970 is a wasteful number, since it uses less digits than its factorization.

8641970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 8641970 is about 2939.7227760454. The cubic root of 8641970 is about 205.2127080300.

The spelling of 8641970 in words is "eight million, six hundred forty-one thousand, nine hundred seventy".