135232040 has 32 divisors (see below), whose sum is σ = 312499080. Its totient is φ = 52630272.

The previous prime is 135232039. The next prime is 135232043. The reversal of 135232040 is 40232531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 133494916 + 1737124 = 11554^2 + 1318^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (135232043) 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, 44207 + ... + 47166.

Almost surely, 2^135232040 is an apocalyptic number.

135232040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135232040 is an abundant number, since it is smaller than the sum of its proper divisors (177267040).

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

135232040 is a wasteful number, since it uses less digits than its factorization.

135232040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91421 (or 91417 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 135232040 is about 11628.9311632669. The cubic root of 135232040 is about 513.2865289685.

Adding to 135232040 its reverse (40232531), we get a palindrome (175464571).

The spelling of 135232040 in words is "one hundred thirty-five million, two hundred thirty-two thousand, forty".