428026217 has 8 divisors (see below), whose sum is σ = 436001856. Its totient is φ = 420097392.

The previous prime is 428026213. The next prime is 428026219. The reversal of 428026217 is 712620824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428026217 - 2² = 428026213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428026211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7028 + ... + 30090.

It is an arithmetic number, because the mean of its divisors is an integer number (54500232).

Almost surely, 2^428026217 is an apocalyptic number.

It is an amenable number.

428026217 is a deficient number, since it is larger than the sum of its proper divisors (7975639).

428026217 is a wasteful number, since it uses less digits than its factorization.

428026217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23407.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 428026217 is about 20688.7944791377. The cubic root of 428026217 is about 753.6275914481.

The spelling of 428026217 in words is "four hundred twenty-eight million, twenty-six thousand, two hundred seventeen".