1028340135 has 48 divisors (see below), whose sum is σ = 1907124960. Its totient is φ = 511038720.

The previous prime is 1028340127. The next prime is 1028340139. The reversal of 1028340135 is 5310438201.

It is a happy number.

It is not a de Polignac number, because 1028340135 - 2³ = 1028340127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1028340099 and 1028340108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028340139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42297 + ... + 62013.

It is an arithmetic number, because the mean of its divisors is an integer number (39731770).

Almost surely, 2^1028340135 is an apocalyptic number.

1028340135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1028340135 is a deficient number, since it is larger than the sum of its proper divisors (878784825).

1028340135 is a wasteful number, since it uses less digits than its factorization.

1028340135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19808 (or 19805 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1028340135 is about 32067.7429046698. The cubic root of 1028340135 is about 1009.3588503456.

Adding to 1028340135 its reverse (5310438201), we get a palindrome (6338778336).

The spelling of 1028340135 in words is "one billion, twenty-eight million, three hundred forty thousand, one hundred thirty-five".