135606440 has 16 divisors (see below), whose sum is σ = 305114580. Its totient is φ = 54242560.

The previous prime is 135606437. The next prime is 135606451. The reversal of 135606440 is 44606531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 130827844 + 4778596 = 11438^2 + 2186^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695041 + ... + 1695120.

Almost surely, 2^135606440 is an apocalyptic number.

135606440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135606440 is an abundant number, since it is smaller than the sum of its proper divisors (169508140).

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

135606440 is a wasteful number, since it uses less digits than its factorization.

135606440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390172 (or 3390168 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 135606440 is about 11645.0178187927. The cubic root of 135606440 is about 513.7597831838.

Subtracting from 135606440 its reverse (44606531), we obtain a palindrome (90999909).

The spelling of 135606440 in words is "one hundred thirty-five million, six hundred six thousand, four hundred forty".