428630539 has 4 divisors (see below), whose sum is σ = 428881320. Its totient is φ = 428379760.

The previous prime is 428630491. The next prime is 428630561. The reversal of 428630539 is 935036824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428630539 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428630569) 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, 122809 + ... + 126250.

It is an arithmetic number, because the mean of its divisors is an integer number (107220330).

Almost surely, 2^428630539 is an apocalyptic number.

428630539 is a deficient number, since it is larger than the sum of its proper divisors (250781).

428630539 is a wasteful number, since it uses less digits than its factorization.

428630539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250780.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 428630539 is about 20703.3943835304. The cubic root of 428630539 is about 753.9821021017.

The spelling of 428630539 in words is "four hundred twenty-eight million, six hundred thirty thousand, five hundred thirty-nine".