4491791840 has 48 divisors (see below), whose sum is σ = 10616834592. Its totient is φ = 1795874304.

The previous prime is 4491791839. The next prime is 4491791849. The reversal of 4491791840 is 481971944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491791849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423077 + ... + 433563.

It is an arithmetic number, because the mean of its divisors is an integer number (221184054).

Almost surely, 2^4491791840 is an apocalyptic number.

4491791840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4491791840 is an abundant number, since it is smaller than the sum of its proper divisors (6125042752).

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

4491791840 is a wasteful number, since it uses less digits than its factorization.

4491791840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13179 (or 13171 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 4491791840 is about 67020.8313884571. The cubic root of 4491791840 is about 1649.9592080518.

The spelling of 4491791840 in words is "four billion, four hundred ninety-one million, seven hundred ninety-one thousand, eight hundred forty".