4491280 has 40 divisors (see below), whose sum is σ = 10785024. Its totient is φ = 1737600.

The previous prime is 4491241. The next prime is 4491301. The reversal of 4491280 is 821944.

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

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 1575 + ... + 3385.

Almost surely, 2^4491280 is an apocalyptic number.

4491280 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 4491280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5392512).

4491280 is an abundant number, since it is smaller than the sum of its proper divisors (6293744).

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

4491280 is a wasteful number, since it uses less digits than its factorization.

4491280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855 (or 1849 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 4491280 is about 2119.2640231930. The cubic root of 4491280 is about 164.9896534681.

The spelling of 4491280 in words is "four million, four hundred ninety-one thousand, two hundred eighty".