3928085520 has 80 divisors (see below), whose sum is σ = 12185862912. Its totient is φ = 1046732800.

The previous prime is 3928085471. The next prime is 3928085537. The reversal of 3928085520 is 255808293.

It is a tau number, because it is divible by the number of its divisors (80).

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, 379129 + ... + 389351.

Almost surely, 2^3928085520 is an apocalyptic number.

3928085520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3928085520 is an abundant number, since it is smaller than the sum of its proper divisors (8257777392).

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

3928085520 is a wasteful number, since it uses less digits than its factorization.

3928085520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11840 (or 11834 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 3928085520 is about 62674.4407234720. The cubic root of 3928085520 is about 1577.8303714238.

The spelling of 3928085520 in words is "three billion, nine hundred twenty-eight million, eighty-five thousand, five hundred twenty".