135505988 has 24 divisors (see below), whose sum is σ = 244098624. Its totient is φ = 65772000.

The previous prime is 135505987. The next prime is 135505999. The reversal of 135505988 is 889505531.

It is a super-2 number, since 2×135505988² = 36723745567712288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135505987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92663 + ... + 94113.

It is an arithmetic number, because the mean of its divisors is an integer number (10170776).

Almost surely, 2^135505988 is an apocalyptic number.

It is an amenable number.

135505988 is a deficient number, since it is larger than the sum of its proper divisors (108592636).

135505988 is a wasteful number, since it uses less digits than its factorization.

135505988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2121 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 44.

The square root of 135505988 is about 11640.7039306049. The cubic root of 135505988 is about 513.6328940624.

The spelling of 135505988 in words is "one hundred thirty-five million, five hundred five thousand, nine hundred eighty-eight".