428189568 has 64 divisors (see below), whose sum is σ = 1165162320. Its totient is φ = 139243520.

The previous prime is 428189539. The next prime is 428189621. The reversal of 428189568 is 865981824.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×428189568² = 366692612288053248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428189568.

It is a congruent 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, 2146 + ... + 29342.

Almost surely, 2^428189568 is an apocalyptic number.

428189568 is a gapful number since it is divisible by the number (48) 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 428189568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582581160).

428189568 is an abundant number, since it is smaller than the sum of its proper divisors (736972752).

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

428189568 is a wasteful number, since it uses less digits than its factorization.

428189568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27255 (or 27243 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The square root of 428189568 is about 20692.7419159472. The cubic root of 428189568 is about 753.7234501895.

The spelling of 428189568 in words is "four hundred twenty-eight million, one hundred eighty-nine thousand, five hundred sixty-eight".