135438880 has 24 divisors (see below), whose sum is σ = 319974732. Its totient is φ = 54175488.

The previous prime is 135438851. The next prime is 135438889. The reversal of 135438880 is 88834531.

It can be written as a sum of positive squares in 2 ways, for example, as 133911184 + 1527696 = 11572^2 + 1236^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (135438889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423087 + ... + 423406.

Almost surely, 2^135438880 is an apocalyptic number.

135438880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135438880 is an abundant number, since it is smaller than the sum of its proper divisors (184535852).

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

135438880 is an equidigital number, since it uses as much as digits as its factorization.

135438880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846508 (or 846500 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 135438880 is about 11637.8211019073. The cubic root of 135438880 is about 513.5480895248.

The spelling of 135438880 in words is "one hundred thirty-five million, four hundred thirty-eight thousand, eight hundred eighty".