4085249728 has 56 divisors (see below), whose sum is σ = 9351459072. Its totient is φ = 1734438144.

The previous prime is 4085249713. The next prime is 4085249737. The reversal of 4085249728 is 8279425804.

It is a tau number, because it is divible by the number of its divisors (56).

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, 5325 + ... + 90547.

Almost surely, 2^4085249728 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 4085249728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4675729536).

4085249728 is an abundant number, since it is smaller than the sum of its proper divisors (5266209344).

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

4085249728 is a wasteful number, since it uses less digits than its factorization.

4085249728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85349 (or 85339 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 4085249728 is about 63915.9583202818. The cubic root of 4085249728 is about 1598.5989986050.

The spelling of 4085249728 in words is "four billion, eighty-five million, two hundred forty-nine thousand, seven hundred twenty-eight".