135538992 has 60 divisors (see below), whose sum is σ = 389588160. Its totient is φ = 43956864.

The previous prime is 135538969. The next prime is 135538999. The reversal of 135538992 is 299835531.

135538992 is a `hidden beast` number, since 1 + 3 + 553 + 8 + 9 + 92 = 666.

It is not an unprimeable number, because it can be changed into a prime (135538999) 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, 7392 + ... + 18047.

It is an arithmetic number, because the mean of its divisors is an integer number (6493136).

Almost surely, 2^135538992 is an apocalyptic number.

135538992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135538992 is an abundant number, since it is smaller than the sum of its proper divisors (254049168).

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

135538992 is a wasteful number, since it uses less digits than its factorization.

135538992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25490 (or 25481 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 135538992 is about 11642.1214561608. The cubic root of 135538992 is about 513.6745910240.

It can be divided in two parts, 1355389 and 92, that added together give a triangular number (1355481 = T₁₆₄₆).

The spelling of 135538992 in words is "one hundred thirty-five million, five hundred thirty-eight thousand, nine hundred ninety-two".