135299988 has 36 divisors (see below), whose sum is σ = 360010560. Its totient is φ = 42726096.

The previous prime is 135299987. The next prime is 135299999. The reversal of 135299988 is 889992531.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135299987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98220 + ... + 99587.

Almost surely, 2^135299988 is an apocalyptic number.

135299988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135299988 is an abundant number, since it is smaller than the sum of its proper divisors (224710572).

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

135299988 is a wasteful number, since it uses less digits than its factorization.

135299988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197836 (or 197831 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 135299988 is about 11631.8523030513. The cubic root of 135299988 is about 513.3724823500.

The spelling of 135299988 in words is "one hundred thirty-five million, two hundred ninety-nine thousand, nine hundred eighty-eight".