428285787 has 4 divisors (see below), whose sum is σ = 571047720. Its totient is φ = 285523856.

The previous prime is 428285747. The next prime is 428285831. The reversal of 428285787 is 787582824.

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

It is a cyclic number.

It is not a de Polignac number, because 428285787 - 2⁶ = 428285723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428285747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71380962 + ... + 71380967.

It is an arithmetic number, because the mean of its divisors is an integer number (142761930).

Almost surely, 2^428285787 is an apocalyptic number.

428285787 is a deficient number, since it is larger than the sum of its proper divisors (142761933).

428285787 is a wasteful number, since it uses less digits than its factorization.

428285787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142761932.

The product of its digits is 2007040, while the sum is 51.

The square root of 428285787 is about 20695.0667309869. The cubic root of 428285787 is about 753.7799026665.

The spelling of 428285787 in words is "four hundred twenty-eight million, two hundred eighty-five thousand, seven hundred eighty-seven".