428939226 has 56 divisors (see below), whose sum is σ = 979293024. Its totient is φ = 140813640.

The previous prime is 428939221. The next prime is 428939237. The reversal of 428939226 is 622939824.

It is not an unprimeable number, because it can be changed into a prime (428939221) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 95491 + ... + 99881.

Almost surely, 2^428939226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428939226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489646512).

428939226 is an abundant number, since it is smaller than the sum of its proper divisors (550353798).

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

428939226 is an equidigital number, since it uses as much as digits as its factorization.

428939226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478 (or 4463 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 428939226 is about 20710.8480270606. The cubic root of 428939226 is about 754.1630571842.

The spelling of 428939226 in words is "four hundred twenty-eight million, nine hundred thirty-nine thousand, two hundred twenty-six".