428650625 has 20 divisors (see below), whose sum is σ = 576855972. Its totient is φ = 316536000.

The previous prime is 428650601. The next prime is 428650637. The reversal of 428650625 is 526056824.

It can be written as a sum of positive squares in 10 ways, for example, as 322992784 + 105657841 = 17972^2 + 10279^2 .

It is not a de Polignac number, because 428650625 - 2⁶ = 428650561 is a prime.

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 19 ways as a sum of consecutive naturals, for example, 18254 + ... + 34503.

Almost surely, 2^428650625 is an apocalyptic number.

It is an amenable number.

428650625 is a deficient number, since it is larger than the sum of its proper divisors (148205347).

428650625 is an equidigital number, since it uses as much as digits as its factorization.

428650625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52790 (or 52775 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 428650625 is about 20703.8794673849. The cubic root of 428650625 is about 753.9938793369.

The spelling of 428650625 in words is "four hundred twenty-eight million, six hundred fifty thousand, six hundred twenty-five".