4390664 has 8 divisors (see below), whose sum is σ = 8232510. Its totient is φ = 2195328.

The previous prime is 4390663. The next prime is 4390667. The reversal of 4390664 is 4660934.

It can be written as a sum of positive squares in only one way, i.e., 4169764 + 220900 = 2042^2 + 470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 4390664.

It is not an unprimeable number, because it can be changed into a prime (4390663) 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 as a sum of consecutive naturals, namely, 274409 + ... + 274424.

Almost surely, 2^4390664 is an apocalyptic number.

It is an amenable number.

4390664 is a deficient number, since it is larger than the sum of its proper divisors (3841846).

4390664 is a wasteful number, since it uses less digits than its factorization.

4390664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548839 (or 548835 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 4390664 is about 2095.3911329391. The cubic root of 4390664 is about 163.7482753349.

The spelling of 4390664 in words is "four million, three hundred ninety thousand, six hundred sixty-four".