428308225 has 12 divisors (see below), whose sum is σ = 531417004. Its totient is φ = 342443520.

The previous prime is 428308219. The next prime is 428308229. The reversal of 428308225 is 522803824.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 61355889 + 366952336 = 7833^2 + 19156^2 .

It is not a de Polignac number, because 428308225 - 2⁵ = 428308193 is a prime.

It is a hoax number, since the sum of its digits (34) 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 (428308229) 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, 49417 + ... + 57433.

Almost surely, 2^428308225 is an apocalyptic number.

It is an amenable number.

428308225 is a deficient number, since it is larger than the sum of its proper divisors (103108779).

428308225 is a wasteful number, since it uses less digits than its factorization.

428308225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164 (or 10159 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 428308225 is about 20695.6088337599. The cubic root of 428308225 is about 753.7930660094.

The spelling of 428308225 in words is "four hundred twenty-eight million, three hundred eight thousand, two hundred twenty-five".