4640644 has 6 divisors (see below), whose sum is σ = 8121134. Its totient is φ = 2320320.

The previous prime is 4640599. The next prime is 4640717. The reversal of 4640644 is 4460464.

It can be written as a sum of positive squares in only one way, i.e., 4359744 + 280900 = 2088^2 + 530^2 .

It is an unprimeable number.

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, 580077 + ... + 580084.

Almost surely, 2^4640644 is an apocalyptic number.

It is an amenable number.

4640644 is a deficient number, since it is larger than the sum of its proper divisors (3480490).

4640644 is a wasteful number, since it uses less digits than its factorization.

4640644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160165 (or 1160163 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 4640644 is about 2154.2154024145. The cubic root of 4640644 is about 166.7987344321.

The spelling of 4640644 in words is "four million, six hundred forty thousand, six hundred forty-four".