428731525 has 6 divisors (see below), whose sum is σ = 531627122. Its totient is φ = 342985200.

The previous prime is 428731507. The next prime is 428731531. The reversal of 428731525 is 525137824.

It can be written as a sum of positive squares in 3 ways, for example, as 126180289 + 302551236 = 11233^2 + 17394^2 .

It is not a de Polignac number, because 428731525 - 2⁹ = 428731013 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 8574606 + ... + 8574655.

Almost surely, 2^428731525 is an apocalyptic number.

It is an amenable number.

428731525 is a deficient number, since it is larger than the sum of its proper divisors (102895597).

428731525 is a wasteful number, since it uses less digits than its factorization.

428731525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17149271 (or 17149266 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 428731525 is about 20705.8331153325. The cubic root of 428731525 is about 754.0413105581.

The spelling of 428731525 in words is "four hundred twenty-eight million, seven hundred thirty-one thousand, five hundred twenty-five".