135291768 has 32 divisors (see below), whose sum is σ = 338981760. Its totient is φ = 44996960.

The previous prime is 135291749. The next prime is 135291791. The reversal of 135291768 is 867192531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5173 + ... + 17243.

It is an arithmetic number, because the mean of its divisors is an integer number (10593180).

Almost surely, 2^135291768 is an apocalyptic number.

It is an amenable number.

135291768 is an abundant number, since it is smaller than the sum of its proper divisors (203689992).

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

135291768 is a wasteful number, since it uses less digits than its factorization.

135291768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12547 (or 12543 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 135291768 is about 11631.4989575721. The cubic root of 135291768 is about 513.3620856817.

The spelling of 135291768 in words is "one hundred thirty-five million, two hundred ninety-one thousand, seven hundred sixty-eight".