135775640 has 128 divisors (see below), whose sum is σ = 410296320. Its totient is φ = 39052800.

The previous prime is 135775637. The next prime is 135775649. The reversal of 135775640 is 46577531.

It is a junction number, because it is equal to n+sod(n) for n = 135775594 and 135775603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135775649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38345 + ... + 41735.

It is an arithmetic number, because the mean of its divisors is an integer number (3205440).

Almost surely, 2^135775640 is an apocalyptic number.

135775640 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 135775640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205148160).

135775640 is an abundant number, since it is smaller than the sum of its proper divisors (274520680).

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

135775640 is a wasteful number, since it uses less digits than its factorization.

135775640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433 (or 3429 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 135775640 is about 11652.2804634973. The cubic root of 135775640 is about 513.9733719242.

The spelling of 135775640 in words is "one hundred thirty-five million, seven hundred seventy-five thousand, six hundred forty".