3928625 has 16 divisors (see below), whose sum is σ = 5003856. Its totient is φ = 3078400.

The previous prime is 3928621. The next prime is 3928637. The reversal of 3928625 is 5268293.

3928625 = 41³ + 42³ + ... + 65³.

It can be written as a sum of positive squares in 8 ways, for example, as 692224 + 3236401 = 832^2 + 1799^2 .

It is not a de Polignac number, because 3928625 - 2² = 3928621 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 9³ + 2¹⁷ + 8⁵ + 6⁸ + 2¹⁷ + 5⁹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928621) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6329 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (312741).

Almost surely, 2^3928625 is an apocalyptic number.

It is an amenable number.

3928625 is a deficient number, since it is larger than the sum of its proper divisors (1075231).

3928625 is an equidigital number, since it uses as much as digits as its factorization.

3928625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 651 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 3928625 is about 1982.0759319461. The cubic root of 3928625 is about 157.7902600754.

The spelling of 3928625 in words is "three million, nine hundred twenty-eight thousand, six hundred twenty-five".