1028239432 has 64 divisors (see below), whose sum is σ = 2162972160. Its totient is φ = 454272000.

The previous prime is 1028239417. The next prime is 1028239439. The reversal of 1028239432 is 2349328201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1028239439) 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, 526057 + ... + 528007.

It is an arithmetic number, because the mean of its divisors is an integer number (33796440).

Almost surely, 2^1028239432 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 1028239432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081486080).

1028239432 is an abundant number, since it is smaller than the sum of its proper divisors (1134732728).

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

1028239432 is a wasteful number, since it uses less digits than its factorization.

1028239432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1028239432 is about 32066.1727058282. The cubic root of 1028239432 is about 1009.3259012013.

The spelling of 1028239432 in words is "one billion, twenty-eight million, two hundred thirty-nine thousand, four hundred thirty-two".