135824720 has 30 divisors (see below), whose sum is σ = 316035018. Its totient is φ = 54288192.

The previous prime is 135824701. The next prime is 135824723. The reversal of 135824720 is 27428531.

It can be written as a sum of positive squares in only one way, i.e., 108659776 + 27164944 = 10424^2 + 5212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135824723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103589 + ... + 104891.

Almost surely, 2^135824720 is an apocalyptic number.

135824720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135824720 is an abundant number, since it is smaller than the sum of its proper divisors (180210298).

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

135824720 is an frugal number, since it uses more digits than its factorization.

135824720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 135824720 is about 11654.3862987289. The cubic root of 135824720 is about 514.0352946033.

The spelling of 135824720 in words is "one hundred thirty-five million, eight hundred twenty-four thousand, seven hundred twenty".