4618640 has 40 divisors (see below), whose sum is σ = 11566968. Its totient is φ = 1704960.

The previous prime is 4618639. The next prime is 4618687. The reversal of 4618640 is 468164.

It can be written as a sum of positive squares in 4 ways, for example, as 21904 + 4596736 = 148^2 + 2144^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181 + ... + 3260.

Almost surely, 2^4618640 is an apocalyptic number.

4618640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4618640 is an abundant number, since it is smaller than the sum of its proper divisors (6948328).

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

4618640 is a wasteful number, since it uses less digits than its factorization.

4618640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467 (or 4461 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 4618640 is about 2149.1021381033. The cubic root of 4618640 is about 166.5346866263.

The spelling of 4618640 in words is "four million, six hundred eighteen thousand, six hundred forty".