135402778 has 24 divisors (see below), whose sum is σ = 248702400. Its totient is φ = 54974808.

The previous prime is 135402749. The next prime is 135402781. The reversal of 135402778 is 877204531.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34498 + ... + 38221.

It is an arithmetic number, because the mean of its divisors is an integer number (10362600).

Almost surely, 2^135402778 is an apocalyptic number.

135402778 is a deficient number, since it is larger than the sum of its proper divisors (113299622).

135402778 is a wasteful number, since it uses less digits than its factorization.

135402778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72754 (or 72747 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 135402778 is about 11636.2699349921. The cubic root of 135402778 is about 513.5024557534.

The spelling of 135402778 in words is "one hundred thirty-five million, four hundred two thousand, seven hundred seventy-eight".