4494640 has 40 divisors (see below), whose sum is σ = 11003760. Its totient is φ = 1702656.

The previous prime is 4494629. The next prime is 4494641. The reversal of 4494640 is 464944.

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

It is not an unprimeable number, because it can be changed into a prime (4494641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 2998.

It is an arithmetic number, because the mean of its divisors is an integer number (275094).

Almost surely, 2^4494640 is an apocalyptic number.

4494640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4494640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5501880).

4494640 is an abundant number, since it is smaller than the sum of its proper divisors (6509120).

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

4494640 is a wasteful number, since it uses less digits than its factorization.

4494640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2983 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 4494640 is about 2120.0566030179. The cubic root of 4494640 is about 165.0307870314.

The spelling of 4494640 in words is "four million, four hundred ninety-four thousand, six hundred forty".