135028440 has 144 divisors (see below), whose sum is σ = 463600800. Its totient is φ = 34079616.

The previous prime is 135028427. The next prime is 135028447. The reversal of 135028440 is 44820531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135028447) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 129441 + ... + 130479.

It is an arithmetic number, because the mean of its divisors is an integer number (3219450).

Almost surely, 2^135028440 is an apocalyptic number.

135028440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135028440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231800400).

135028440 is an abundant number, since it is smaller than the sum of its proper divisors (328572360).

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

135028440 is a wasteful number, since it uses less digits than its factorization.

135028440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1068 counting only the distinct ones).

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

The square root of 135028440 is about 11620.1738369097. The cubic root of 135028440 is about 513.0288049669.

Adding to 135028440 its reverse (44820531), we get a palindrome (179848971).

The spelling of 135028440 in words is "one hundred thirty-five million, twenty-eight thousand, four hundred forty".