135983778 has 16 divisors (see below), whose sum is σ = 310820160. Its totient is φ = 38852496.

The previous prime is 135983753. The next prime is 135983801. The reversal of 135983778 is 877389531.

It is a self number, because there is not a number n which added to its sum of digits gives 135983778.

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, 1618813 + ... + 1618896.

It is an arithmetic number, because the mean of its divisors is an integer number (19426260).

Almost surely, 2^135983778 is an apocalyptic number.

135983778 is an abundant number, since it is smaller than the sum of its proper divisors (174836382).

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

135983778 is a wasteful number, since it uses less digits than its factorization.

135983778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237721.

The product of its digits is 1270080, while the sum is 51.

The square root of 135983778 is about 11661.2082564372. The cubic root of 135983778 is about 514.2358705883.

The spelling of 135983778 in words is "one hundred thirty-five million, nine hundred eighty-three thousand, seven hundred seventy-eight".