135331968 has 64 divisors (see below), whose sum is σ = 380639520. Its totient is φ = 42455040.

The previous prime is 135331967. The next prime is 135331969. The reversal of 135331968 is 869133531.

It is an interprime number because it is at equal distance from previous prime (135331967) and next prime (135331969).

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (135331967) 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, 3838 + ... + 16893.

Almost surely, 2^135331968 is an apocalyptic number.

It is an amenable number.

135331968 is an abundant number, since it is smaller than the sum of its proper divisors (245307552).

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

135331968 is a wasteful number, since it uses less digits than its factorization.

135331968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20765 (or 20753 counting only the distinct ones).

The product of its digits is 58320, while the sum is 39.

The square root of 135331968 is about 11633.2268954061. The cubic root of 135331968 is about 513.4129266961.

The spelling of 135331968 in words is "one hundred thirty-five million, three hundred thirty-one thousand, nine hundred sixty-eight".