428369256 has 128 divisors (see below), whose sum is σ = 1378886400. Its totient is φ = 120683520.

The previous prime is 428369251. The next prime is 428369299. The reversal of 428369256 is 652963824.

It is not an unprimeable number, because it can be changed into a prime (428369251) 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, 108436 + ... + 112316.

It is an arithmetic number, because the mean of its divisors is an integer number (10772550).

Almost surely, 2^428369256 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 428369256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689443200).

428369256 is an abundant number, since it is smaller than the sum of its proper divisors (950517144).

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

428369256 is a wasteful number, since it uses less digits than its factorization.

428369256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976 (or 3966 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 428369256 is about 20697.0832727706. The cubic root of 428369256 is about 753.8288677654.

The spelling of 428369256 in words is "four hundred twenty-eight million, three hundred sixty-nine thousand, two hundred fifty-six".