1028440530 has 128 divisors (see below), whose sum is σ = 3033676800. Its totient is φ = 246281472.

The previous prime is 1028440507. The next prime is 1028440537. The reversal of 1028440530 is 350448201.

1028440530 is a `hidden beast` number, since 10 + 2 + 84 + 40 + 530 = 666.

1028440530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1028440494 and 1028440503.

It is not an unprimeable number, because it can be changed into a prime (1028440537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 125911 + ... + 133829.

It is an arithmetic number, because the mean of its divisors is an integer number (23700600).

Almost surely, 2^1028440530 is an apocalyptic number.

1028440530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028440530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516838400).

1028440530 is an abundant number, since it is smaller than the sum of its proper divisors (2005236270).

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

1028440530 is a wasteful number, since it uses less digits than its factorization.

1028440530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7985 (or 7979 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1028440530 is about 32069.3082245314. The cubic root of 1028440530 is about 1009.3916965738.

Adding to 1028440530 its reverse (350448201), we get a palindrome (1378888731).

The spelling of 1028440530 in words is "one billion, twenty-eight million, four hundred forty thousand, five hundred thirty".