3728111225 has 6 divisors (see below), whose sum is σ = 4622857950. Its totient is φ = 2982488960.

The previous prime is 3728111161. The next prime is 3728111287. The reversal of 3728111225 is 5221118273.

It can be written as a sum of positive squares in 3 ways, for example, as 204976489 + 3523134736 = 14317^2 + 59356^2 .

It is not a de Polignac number, because 3728111225 - 2⁶ = 3728111161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3728111191 and 3728111200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74562200 + ... + 74562249.

It is an arithmetic number, because the mean of its divisors is an integer number (770476325).

Almost surely, 2^3728111225 is an apocalyptic number.

It is an amenable number.

3728111225 is a deficient number, since it is larger than the sum of its proper divisors (894746725).

3728111225 is a wasteful number, since it uses less digits than its factorization.

3728111225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149124459 (or 149124454 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 3728111225 is about 61058.2609071041. The cubic root of 3728111225 is about 1550.5875296093.

Adding to 3728111225 its reverse (5221118273), we get a palindrome (8949229498).

The spelling of 3728111225 in words is "three billion, seven hundred twenty-eight million, one hundred eleven thousand, two hundred twenty-five".