135604720 has 40 divisors (see below), whose sum is σ = 318193920. Its totient is φ = 53740800.

The previous prime is 135604709. The next prime is 135604759. The reversal of 135604720 is 27406531.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945 + ... + 16495.

It is an arithmetic number, because the mean of its divisors is an integer number (7954848).

Almost surely, 2^135604720 is an apocalyptic number.

135604720 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 135604720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159096960).

135604720 is an abundant number, since it is smaller than the sum of its proper divisors (182589200).

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

135604720 is a wasteful number, since it uses less digits than its factorization.

135604720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15673 (or 15667 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 135604720 is about 11644.9439672332. The cubic root of 135604720 is about 513.7576110388.

The spelling of 135604720 in words is "one hundred thirty-five million, six hundred four thousand, seven hundred twenty".