135720860 has 72 divisors (see below), whose sum is σ = 331808400. Its totient is φ = 46435840.

The previous prime is 135720829. The next prime is 135720889. The reversal of 135720860 is 68027531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39491 + ... + 42789.

It is an arithmetic number, because the mean of its divisors is an integer number (4608450).

Almost surely, 2^135720860 is an apocalyptic number.

135720860 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 135720860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165904200).

135720860 is an abundant number, since it is smaller than the sum of its proper divisors (196087540).

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

135720860 is a wasteful number, since it uses less digits than its factorization.

135720860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347 (or 3334 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 135720860 is about 11649.9296135213. The cubic root of 135720860 is about 513.9042401106.

The spelling of 135720860 in words is "one hundred thirty-five million, seven hundred twenty thousand, eight hundred sixty".