135489888 has 48 divisors (see below), whose sum is σ = 395181360. Its totient is φ = 45163008.

The previous prime is 135489883. The next prime is 135489917. The reversal of 135489888 is 888984531.

135489888 is a `hidden beast` number, since 1 + 3 + 548 + 98 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135489883) 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, 77545 + ... + 79272.

It is an arithmetic number, because the mean of its divisors is an integer number (8232945).

Almost surely, 2^135489888 is an apocalyptic number.

135489888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135489888 is an abundant number, since it is smaller than the sum of its proper divisors (259691472).

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

135489888 is a wasteful number, since it uses less digits than its factorization.

135489888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156836 (or 156822 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 135489888 is about 11640.0123711274. The cubic root of 135489888 is about 513.6125510078.

It can be divided in two parts, 13548 and 9888, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 135489888 in words is "one hundred thirty-five million, four hundred eighty-nine thousand, eight hundred eighty-eight".