3928520 has 16 divisors (see below), whose sum is σ = 8839260. Its totient is φ = 1571392.

The previous prime is 3928493. The next prime is 3928553. The reversal of 3928520 is 258293.

It can be written as a sum of positive squares in 2 ways, for example, as 3928324 + 196 = 1982^2 + 14^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49067 + ... + 49146.

Almost surely, 2^3928520 is an apocalyptic number.

It is an amenable number.

3928520 is an abundant number, since it is smaller than the sum of its proper divisors (4910740).

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

3928520 is a wasteful number, since it uses less digits than its factorization.

3928520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98224 (or 98220 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3928520 is about 1982.0494443883. The cubic root of 3928520 is about 157.7888543143.

The spelling of 3928520 in words is "three million, nine hundred twenty-eight thousand, five hundred twenty".