428216871 has 16 divisors (see below), whose sum is σ = 596504160. Its totient is φ = 272899200.

The previous prime is 428216869. The next prime is 428216909. The reversal of 428216871 is 178612824.

It is a happy number.

It is not a de Polignac number, because 428216871 - 2¹ = 428216869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428216821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15580 + ... + 33153.

It is an arithmetic number, because the mean of its divisors is an integer number (37281510).

Almost surely, 2^428216871 is an apocalyptic number.

428216871 is a deficient number, since it is larger than the sum of its proper divisors (168287289).

428216871 is a wasteful number, since it uses less digits than its factorization.

428216871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48866.

The product of its digits is 43008, while the sum is 39.

The square root of 428216871 is about 20693.4016295050. The cubic root of 428216871 is about 753.7394699430.

The spelling of 428216871 in words is "four hundred twenty-eight million, two hundred sixteen thousand, eight hundred seventy-one".