428233625 has 8 divisors (see below), whose sum is σ = 534435720. Its totient is φ = 342586800.

The previous prime is 428233613. The next prime is 428233639. The reversal of 428233625 is 526332824.

It can be written as a sum of positive squares in 4 ways, for example, as 405769 + 427827856 = 637^2 + 20684^2 .

It is a de Polignac number, because none of the positive numbers 2^k-428233625 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712810 + ... + 1713059.

It is an arithmetic number, because the mean of its divisors is an integer number (66804465).

Almost surely, 2^428233625 is an apocalyptic number.

It is an amenable number.

428233625 is a deficient number, since it is larger than the sum of its proper divisors (106202095).

428233625 is an equidigital number, since it uses as much as digits as its factorization.

428233625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425884 (or 3425874 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 428233625 is about 20693.8064405754. The cubic root of 428233625 is about 753.7492998425.

The spelling of 428233625 in words is "four hundred twenty-eight million, two hundred thirty-three thousand, six hundred twenty-five".