426217720 has 64 divisors (see below), whose sum is σ = 985374720. Its totient is φ = 165830784.

The previous prime is 426217691. The next prime is 426217721. The reversal of 426217720 is 27712624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426217721) 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, 658437 + ... + 659083.

It is an arithmetic number, because the mean of its divisors is an integer number (15396480).

Almost surely, 2^426217720 is an apocalyptic number.

426217720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426217720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492687360).

426217720 is an abundant number, since it is smaller than the sum of its proper divisors (559157000).

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

426217720 is a wasteful number, since it uses less digits than its factorization.

426217720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 426217720 is about 20645.0410510611. The cubic root of 426217720 is about 752.5646835712.

The spelling of 426217720 in words is "four hundred twenty-six million, two hundred seventeen thousand, seven hundred twenty".