4239991520 has 144 divisors (see below), whose sum is σ = 10618812288. Its totient is φ = 1597639680.

The previous prime is 4239991499. The next prime is 4239991529. The reversal of 4239991520 is 251999324.

It is a happy number.

4239991520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4239991529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33385697 + ... + 33385823.

It is an arithmetic number, because the mean of its divisors is an integer number (73741752).

Almost surely, 2^4239991520 is an apocalyptic number.

4239991520 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 4239991520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5309406144).

4239991520 is an abundant number, since it is smaller than the sum of its proper divisors (6378820768).

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

4239991520 is a wasteful number, since it uses less digits than its factorization.

4239991520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 4239991520 is about 65115.2172690839. The cubic root of 4239991520 is about 1618.5333878896.

The spelling of 4239991520 in words is "four billion, two hundred thirty-nine million, nine hundred ninety-one thousand, five hundred twenty".