1028443115 has 24 divisors (see below), whose sum is σ = 1511188560. Its totient is φ = 668098368.

The previous prime is 1028443109. The next prime is 1028443187. The reversal of 1028443115 is 5113448201.

It is not a de Polignac number, because 1028443115 - 2¹⁴ = 1028426731 is a prime.

It is a super-3 number, since 3×1028443115³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105812 + ... + 115121.

It is an arithmetic number, because the mean of its divisors is an integer number (62966190).

Almost surely, 2^1028443115 is an apocalyptic number.

1028443115 is a deficient number, since it is larger than the sum of its proper divisors (482745445).

1028443115 is a wasteful number, since it uses less digits than its factorization.

1028443115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220971 (or 220964 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1028443115 is about 32069.3485278389. The cubic root of 1028443115 is about 1009.3925422800.

The spelling of 1028443115 in words is "one billion, twenty-eight million, four hundred forty-three thousand, one hundred fifteen".