428744256 has 56 divisors (see below), whose sum is σ = 1151351520. Its totient is φ = 140777472.

The previous prime is 428744237. The next prime is 428744273. The reversal of 428744256 is 652447824.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3801 + ... + 29528.

Almost surely, 2^428744256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428744256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575675760).

428744256 is an abundant number, since it is smaller than the sum of its proper divisors (722607264).

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

428744256 is a wasteful number, since it uses less digits than its factorization.

428744256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33411 (or 33401 counting only the distinct ones).

The product of its digits is 430080, while the sum is 42.

The square root of 428744256 is about 20706.1405384973. The cubic root of 428744256 is about 754.0487741294.

The spelling of 428744256 in words is "four hundred twenty-eight million, seven hundred forty-four thousand, two hundred fifty-six".