428168532 has 48 divisors (see below), whose sum is σ = 1095966144. Its totient is φ = 129024000.

The previous prime is 428168519. The next prime is 428168539. The reversal of 428168532 is 235861824.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428168539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14932 + ... + 32852.

It is an arithmetic number, because the mean of its divisors is an integer number (22832628).

Almost surely, 2^428168532 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 428168532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547983072).

428168532 is an abundant number, since it is smaller than the sum of its proper divisors (667797612).

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

428168532 is a wasteful number, since it uses less digits than its factorization.

428168532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18120 (or 18118 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 428168532 is about 20692.2336155380. The cubic root of 428168532 is about 753.7111070691.

The spelling of 428168532 in words is "four hundred twenty-eight million, one hundred sixty-eight thousand, five hundred thirty-two".