428560992 has 72 divisors (see below), whose sum is σ = 1228421376. Its totient is φ = 141716736.

The previous prime is 428560991. The next prime is 428560997. The reversal of 428560992 is 299065824.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428560991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30718 + ... + 42434.

It is an arithmetic number, because the mean of its divisors is an integer number (17061408).

Almost surely, 2^428560992 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 428560992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614210688).

428560992 is an abundant number, since it is smaller than the sum of its proper divisors (799860384).

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

428560992 is a wasteful number, since it uses less digits than its factorization.

428560992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11860 (or 11849 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 428560992 is about 20701.7147115885. The cubic root of 428560992 is about 753.9413210368.

The spelling of 428560992 in words is "four hundred twenty-eight million, five hundred sixty thousand, nine hundred ninety-two".