428445792 has 144 divisors (see below), whose sum is σ = 1292683392. Its totient is φ = 134369280.

The previous prime is 428445779. The next prime is 428445793. The reversal of 428445792 is 297544824.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428445793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329688 + ... + 330984.

It is an arithmetic number, because the mean of its divisors is an integer number (8976968).

Almost surely, 2^428445792 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 428445792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646341696).

428445792 is an abundant number, since it is smaller than the sum of its proper divisors (864237600).

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

428445792 is a wasteful number, since it uses less digits than its factorization.

428445792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381 (or 1370 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 428445792 is about 20698.9321463693. The cubic root of 428445792 is about 753.8737601954.

The spelling of 428445792 in words is "four hundred twenty-eight million, four hundred forty-five thousand, seven hundred ninety-two".