135123828 has 24 divisors (see below), whose sum is σ = 360330432. Its totient is φ = 38606784.

The previous prime is 135123817. The next prime is 135123853. The reversal of 135123828 is 828321531.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 804225 + ... + 804392.

It is an arithmetic number, because the mean of its divisors is an integer number (15013768).

Almost surely, 2^135123828 is an apocalyptic number.

It is an amenable number.

135123828 is an abundant number, since it is smaller than the sum of its proper divisors (225206604).

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

135123828 is a wasteful number, since it uses less digits than its factorization.

135123828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608631 (or 1608629 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 135123828 is about 11624.2775259368. The cubic root of 135123828 is about 513.1495826656.

The spelling of 135123828 in words is "one hundred thirty-five million, one hundred twenty-three thousand, eight hundred twenty-eight".