4433721920 has 56 divisors (see below), whose sum is σ = 10633862400. Its totient is φ = 1760712192.

The previous prime is 4433721893. The next prime is 4433721949. The reversal of 4433721920 is 291273344.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5360 + ... + 94319.

It is an arithmetic number, because the mean of its divisors is an integer number (189890400).

Almost surely, 2^4433721920 is an apocalyptic number.

4433721920 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 4433721920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5316931200).

4433721920 is an abundant number, since it is smaller than the sum of its proper divisors (6200140480).

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

4433721920 is a wasteful number, since it uses less digits than its factorization.

4433721920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99835 (or 99825 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 4433721920 is about 66586.1991706990. The cubic root of 4433721920 is about 1642.8181171970.

The spelling of 4433721920 in words is "four billion, four hundred thirty-three million, seven hundred twenty-one thousand, nine hundred twenty".