428308992 has 80 divisors (see below), whose sum is σ = 1267865280. Its totient is φ = 142765056.

The previous prime is 428308973. The next prime is 428308997. The reversal of 428308992 is 299803824.

It is not an unprimeable number, because it can be changed into a prime (428308997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1668 + ... + 29315.

It is an arithmetic number, because the mean of its divisors is an integer number (15848316).

Almost surely, 2^428308992 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 428308992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633932640).

428308992 is an abundant number, since it is smaller than the sum of its proper divisors (839556288).

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

428308992 is an equidigital number, since it uses as much as digits as its factorization.

428308992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31010 (or 30988 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 428308992 is about 20695.6273642526. The cubic root of 428308992 is about 753.7935159649.

The spelling of 428308992 in words is "four hundred twenty-eight million, three hundred eight thousand, nine hundred ninety-two".