4491520 has 108 divisors (see below), whose sum is σ = 12233340. Its totient is φ = 1576960.

The previous prime is 4491503. The next prime is 4491533. The reversal of 4491520 is 251944.

4491520 = T₂₂₉ + T₂₃₀ + ... + T₃₃₈.

It can be written as a sum of positive squares in 2 ways, for example, as 1982464 + 2509056 = 1408^2 + 1584^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154866 + ... + 154894.

Almost surely, 2^4491520 is an apocalyptic number.

4491520 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 4491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6116670).

4491520 is an abundant number, since it is smaller than the sum of its proper divisors (7741820).

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

4491520 is a wasteful number, since it uses less digits than its factorization.

4491520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 4491520 is about 2119.3206458674. The cubic root of 4491520 is about 164.9925922600.

The spelling of 4491520 in words is "four million, four hundred ninety-one thousand, five hundred twenty".