136872978 has 32 divisors (see below), whose sum is σ = 301603392. Its totient is φ = 41064000.

The previous prime is 136872973. The next prime is 136872991. The reversal of 136872978 is 879278631.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 136872978.

It is not an unprimeable number, because it can be changed into a prime (136872971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3601 + ... + 16932.

It is an arithmetic number, because the mean of its divisors is an integer number (9425106).

Almost surely, 2^136872978 is an apocalyptic number.

136872978 is an abundant number, since it is smaller than the sum of its proper divisors (164730414).

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

136872978 is a wasteful number, since it uses less digits than its factorization.

136872978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20650.

The product of its digits is 1016064, while the sum is 51.

The square root of 136872978 is about 11699.2725414874. The cubic root of 136872978 is about 515.3543017088.

The spelling of 136872978 in words is "one hundred thirty-six million, eight hundred seventy-two thousand, nine hundred seventy-eight".