135909620 has 144 divisors (see below), whose sum is σ = 366799104. Its totient is φ = 41395200.

The previous prime is 135909619. The next prime is 135909643. The reversal of 135909620 is 26909531.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1202684 + ... + 1202796.

It is an arithmetic number, because the mean of its divisors is an integer number (2547216).

Almost surely, 2^135909620 is an apocalyptic number.

135909620 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 135909620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183399552).

135909620 is an abundant number, since it is smaller than the sum of its proper divisors (230889484).

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

135909620 is a wasteful number, since it uses less digits than its factorization.

135909620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 135909620 is about 11658.0281351522. The cubic root of 135909620 is about 514.1423750294.

The spelling of 135909620 in words is "one hundred thirty-five million, nine hundred nine thousand, six hundred twenty".