8281664 has 14 divisors (see below), whose sum is σ = 16434054. Its totient is φ = 4140800.

The previous prime is 8281643. The next prime is 8281687. The reversal of 8281664 is 4661828.

It can be written as a sum of positive squares in only one way, i.e., 5721664 + 2560000 = 2392^2 + 1600^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64637 + ... + 64764.

It is an arithmetic number, because the mean of its divisors is an integer number (1173861).

Almost surely, 2^8281664 is an apocalyptic number.

It is an amenable number.

8281664 is a deficient number, since it is larger than the sum of its proper divisors (8152390).

8281664 is a wasteful number, since it uses less digits than its factorization.

8281664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129413 (or 129403 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 8281664 is about 2877.7880394497. The cubic root of 8281664 is about 202.3201797458.

The spelling of 8281664 in words is "eight million, two hundred eighty-one thousand, six hundred sixty-four".