428587284 has 24 divisors (see below), whose sum is σ = 1000550880. Its totient is φ = 142789024.

The previous prime is 428587279. The next prime is 428587303. The reversal of 428587284 is 482785824.

It is a congruent 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, 18487 + ... + 34625.

It is an arithmetic number, because the mean of its divisors is an integer number (41689620).

Almost surely, 2^428587284 is an apocalyptic number.

It is an amenable number.

428587284 is an abundant number, since it is smaller than the sum of its proper divisors (571963596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428587284 is a wasteful number, since it uses less digits than its factorization.

428587284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18359 (or 18357 counting only the distinct ones).

The product of its digits is 1146880, while the sum is 48.

The square root of 428587284 is about 20702.3497217103. The cubic root of 428587284 is about 753.9567386943.

The spelling of 428587284 in words is "four hundred twenty-eight million, five hundred eighty-seven thousand, two hundred eighty-four".