3928281808 has 80 divisors (see below), whose sum is σ = 8753725440. Its totient is φ = 1691107200.

The previous prime is 3928281713. The next prime is 3928281811. The reversal of 3928281808 is 8081828293.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248773 + ... + 264091.

It is an arithmetic number, because the mean of its divisors is an integer number (109421568).

Almost surely, 2^3928281808 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 3928281808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4376862720).

3928281808 is an abundant number, since it is smaller than the sum of its proper divisors (4825443632).

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

3928281808 is a wasteful number, since it uses less digits than its factorization.

3928281808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15416 (or 15410 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 3928281808 is about 62676.0066373090. The cubic root of 3928281808 is about 1577.8566525904.

The spelling of 3928281808 in words is "three billion, nine hundred twenty-eight million, two hundred eighty-one thousand, eight hundred eight".