8640974 has 4 divisors (see below), whose sum is σ = 12961464. Its totient is φ = 4320486.

The previous prime is 8640967. The next prime is 8640977. The reversal of 8640974 is 4790468.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640977) 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, 2160242 + ... + 2160245.

It is an arithmetic number, because the mean of its divisors is an integer number (3240366).

Almost surely, 2^8640974 is an apocalyptic number.

8640974 is a deficient number, since it is larger than the sum of its proper divisors (4320490).

8640974 is a wasteful number, since it uses less digits than its factorization.

8640974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320489.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 8640974 is about 2939.5533674353. The cubic root of 8640974 is about 205.2048240363.

The spelling of 8640974 in words is "eight million, six hundred forty thousand, nine hundred seventy-four".