136840878 has 24 divisors (see below), whose sum is σ = 303385368. Its totient is φ = 44552592.

The previous prime is 136840861. The next prime is 136840901. The reversal of 136840878 is 878048631.

It is a congruent number.

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, 87625 + ... + 89172.

It is an arithmetic number, because the mean of its divisors is an integer number (12641057).

Almost surely, 2^136840878 is an apocalyptic number.

136840878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136840878 is an abundant number, since it is smaller than the sum of its proper divisors (166544490).

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

136840878 is a wasteful number, since it uses less digits than its factorization.

136840878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176848 (or 176845 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 136840878 is about 11697.9005808735. The cubic root of 136840878 is about 515.3140109060.

The spelling of 136840878 in words is "one hundred thirty-six million, eight hundred forty thousand, eight hundred seventy-eight".