4640440264 has 8 divisors (see below), whose sum is σ = 8700825510. Its totient is φ = 2320220128.

The previous prime is 4640440261. The next prime is 4640440271. The reversal of 4640440264 is 4620440464.

It can be written as a sum of positive squares in only one way, i.e., 4414539364 + 225900900 = 66442^2 + 15030^2 .

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

It is not an unprimeable number, because it can be changed into a prime (4640440261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290027509 + ... + 290027524.

Almost surely, 2^4640440264 is an apocalyptic number.

It is an amenable number.

4640440264 is a deficient number, since it is larger than the sum of its proper divisors (4060385246).

4640440264 is a wasteful number, since it uses less digits than its factorization.

4640440264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580055039 (or 580055035 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The square root of 4640440264 is about 68120.7770360850. Note that the first 3 decimals coincide. The cubic root of 4640440264 is about 1667.9629343438.

It can be divided in two parts, 46404 and 40264, that added together give a palindrome (86668).

The spelling of 4640440264 in words is "four billion, six hundred forty million, four hundred forty thousand, two hundred sixty-four".