8425664 has 84 divisors (see below), whose sum is σ = 19522440. Its totient is φ = 3594240.

The previous prime is 8425663. The next prime is 8425667. The reversal of 8425664 is 4665248.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8425663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205484 + ... + 205524.

It is an arithmetic number, because the mean of its divisors is an integer number (232410).

Almost surely, 2^8425664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8425664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9761220).

8425664 is an abundant number, since it is smaller than the sum of its proper divisors (11096776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8425664 is a wasteful number, since it uses less digits than its factorization.

8425664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 75 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 8425664 is about 2902.6994332862. The cubic root of 8425664 is about 203.4860830774.

The spelling of 8425664 in words is "eight million, four hundred twenty-five thousand, six hundred sixty-four".