3728225 has 12 divisors (see below), whose sum is σ = 4652604. Its totient is φ = 2963520.

The previous prime is 3728203. The next prime is 3728243. The reversal of 3728225 is 5228273.

3728225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 208849 + 3519376 = 457^2 + 1876^2 .

It is not a de Polignac number, because 3728225 - 2¹² = 3724129 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 7³ + 2 + 8³ + 2¹⁵ + 2²¹ + 5⁵ .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4547 + ... + 5303.

It is an arithmetic number, because the mean of its divisors is an integer number (387717).

Almost surely, 2^3728225 is an apocalyptic number.

It is an amenable number.

3728225 is a deficient number, since it is larger than the sum of its proper divisors (924379).

3728225 is a wasteful number, since it uses less digits than its factorization.

3728225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 959 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 3728225 is about 1930.8612068194. The cubic root of 3728225 is about 155.0603303128.

The spelling of 3728225 in words is "three million, seven hundred twenty-eight thousand, two hundred twenty-five".