3928225 has 12 divisors (see below), whose sum is σ = 5567104. Its totient is φ = 2693520.

The previous prime is 3928189. The next prime is 3928229. The reversal of 3928225 is 5228293.

It is not a de Polignac number, because 3928225 - 2⁷ = 3928097 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11049 + ... + 11398.

Almost surely, 2^3928225 is an apocalyptic number.

3928225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3928225 is a deficient number, since it is larger than the sum of its proper divisors (1638879).

3928225 is a wasteful number, since it uses less digits than its factorization.

3928225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22464 (or 22459 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 3928225 is about 1981.9750250697. The cubic root of 3928225 is about 157.7849046609.

The spelling of 3928225 in words is "three million, nine hundred twenty-eight thousand, two hundred twenty-five".