428220132 has 24 divisors (see below), whose sum is σ = 1011830400. Its totient is φ = 140932896.

The previous prime is 428220109. The next prime is 428220139. The reversal of 428220132 is 231022824.

It is not an unprimeable number, because it can be changed into a prime (428220139) 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, 224907 + ... + 226802.

It is an arithmetic number, because the mean of its divisors is an integer number (42159600).

Almost surely, 2^428220132 is an apocalyptic number.

It is an amenable number.

428220132 is an abundant number, since it is smaller than the sum of its proper divisors (583610268).

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

428220132 is a wasteful number, since it uses less digits than its factorization.

428220132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451795 (or 451793 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 428220132 is about 20693.4804225872. The cubic root of 428220132 is about 753.7413832556.

Adding to 428220132 its reverse (231022824), we get a palindrome (659242956).

The spelling of 428220132 in words is "four hundred twenty-eight million, two hundred twenty thousand, one hundred thirty-two".