428217272 has 24 divisors (see below), whose sum is σ = 933995160. Its totient is φ = 183521520.

The previous prime is 428217227. The next prime is 428217287. The reversal of 428217272 is 272712824.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 545804 + ... + 546587.

It is an arithmetic number, because the mean of its divisors is an integer number (38916465).

Almost surely, 2^428217272 is an apocalyptic number.

It is an amenable number.

428217272 is an abundant number, since it is smaller than the sum of its proper divisors (505777888).

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

428217272 is a wasteful number, since it uses less digits than its factorization.

428217272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092411 (or 1092400 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 428217272 is about 20693.4113185816. The cubic root of 428217272 is about 753.7397052206.

The spelling of 428217272 in words is "four hundred twenty-eight million, two hundred seventeen thousand, two hundred seventy-two".