428025205 has 4 divisors (see below), whose sum is σ = 513630252. Its totient is φ = 342420160.

The previous prime is 428025203. The next prime is 428025209. The reversal of 428025205 is 502520824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128527569 + 299497636 = 11337^2 + 17306^2 .

It is not a de Polignac number, because 428025205 - 2¹ = 428025203 is a prime.

It is a super-2 number, since 2×428025205² = 366411152230584050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428025203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42802516 + ... + 42802525.

It is an arithmetic number, because the mean of its divisors is an integer number (128407563).

Almost surely, 2^428025205 is an apocalyptic number.

It is an amenable number.

428025205 is a deficient number, since it is larger than the sum of its proper divisors (85605047).

428025205 is an equidigital number, since it uses as much as digits as its factorization.

428025205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85605046.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 428025205 is about 20688.7700214392. The cubic root of 428025205 is about 753.6269975034.

The spelling of 428025205 in words is "four hundred twenty-eight million, twenty-five thousand, two hundred five".