4640144 has 20 divisors (see below), whose sum is σ = 9106560. Its totient is φ = 2290080.

The previous prime is 4640143. The next prime is 4640147. The reversal of 4640144 is 4410464.

It is not an unprimeable number, because it can be changed into a prime (4640143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572 + ... + 3099.

It is an arithmetic number, because the mean of its divisors is an integer number (455328).

Almost surely, 2^4640144 is an apocalyptic number.

It is an amenable number.

4640144 is a deficient number, since it is larger than the sum of its proper divisors (4466416).

4640144 is a wasteful number, since it uses less digits than its factorization.

4640144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758 (or 3752 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4640144 is about 2154.0993477553. The cubic root of 4640144 is about 166.7927437145.

The spelling of 4640144 in words is "four million, six hundred forty thousand, one hundred forty-four".