428561226 has 64 divisors (see below), whose sum is σ = 1008000000. Its totient is φ = 134590896.

The previous prime is 428561219. The next prime is 428561227. The reversal of 428561226 is 622165824.

It is a happy number.

428561226 is a `hidden beast` number, since 428 + 5 + 6 + 1 + 226 = 666.

It is not an unprimeable number, because it can be changed into a prime (428561227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203125 + ... + 205223.

It is an arithmetic number, because the mean of its divisors is an integer number (15750000).

Almost surely, 2^428561226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428561226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504000000).

428561226 is an abundant number, since it is smaller than the sum of its proper divisors (579438774).

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

428561226 is a wasteful number, since it uses less digits than its factorization.

428561226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328 (or 2322 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 428561226 is about 20701.7203632935. The cubic root of 428561226 is about 753.9414582574.

The spelling of 428561226 in words is "four hundred twenty-eight million, five hundred sixty-one thousand, two hundred twenty-six".