4464640 has 56 divisors (see below), whose sum is σ = 10812780. Its totient is φ = 1769472.

The previous prime is 4464623. The next prime is 4464641. The reversal of 4464640 is 464644.

It can be written as a sum of positive squares in 2 ways, for example, as 4460544 + 4096 = 2112^2 + 64^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 4464599 and 4464608.

It is not an unprimeable number, because it can be changed into a prime (4464641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40906 + ... + 41014.

Almost surely, 2^4464640 is an apocalyptic number.

4464640 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 4464640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5406390).

4464640 is an abundant number, since it is smaller than the sum of its proper divisors (6348140).

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

4464640 is an equidigital number, since it uses as much as digits as its factorization.

4464640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 116 counting only the distinct ones).

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

The square root of 4464640 is about 2112.9694744601. The cubic root of 4464640 is about 164.6627946514.

The spelling of 4464640 in words is "four million, four hundred sixty-four thousand, six hundred forty".