4028721952 has 48 divisors (see below), whose sum is σ = 8361868032. Its totient is φ = 1906882560.

The previous prime is 4028721941. The next prime is 4028721953. The reversal of 4028721952 is 2591278204.

It is not an unprimeable number, because it can be changed into a prime (4028721953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43177 + ... + 99607.

It is an arithmetic number, because the mean of its divisors is an integer number (174205584).

Almost surely, 2^4028721952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4028721952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4180934016).

4028721952 is an abundant number, since it is smaller than the sum of its proper divisors (4333146080).

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

4028721952 is a wasteful number, since it uses less digits than its factorization.

4028721952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56561 (or 56553 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 4028721952 is about 63472.2140152681. The cubic root of 4028721952 is about 1591.1914322011.

The spelling of 4028721952 in words is "four billion, twenty-eight million, seven hundred twenty-one thousand, nine hundred fifty-two".