135728250 has 128 divisors (see below), whose sum is σ = 392491008. Its totient is φ = 30600000.

The previous prime is 135728249. The next prime is 135728269. The reversal of 135728250 is 52827531.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 540625 + ... + 540875.

It is an arithmetic number, because the mean of its divisors is an integer number (3066336).

Almost surely, 2^135728250 is an apocalyptic number.

135728250 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 135728250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196245504).

135728250 is an abundant number, since it is smaller than the sum of its proper divisors (256762758).

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

135728250 is a wasteful number, since it uses less digits than its factorization.

135728250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 135728250 is about 11650.2467785022. The cubic root of 135728250 is about 513.9135673023.

The spelling of 135728250 in words is "one hundred thirty-five million, seven hundred twenty-eight thousand, two hundred fifty".