136243278 has 12 divisors (see below), whose sum is σ = 295193808. Its totient is φ = 45414420.

The previous prime is 136243277. The next prime is 136243279. The reversal of 136243278 is 872342631.

It is a happy number.

136243278 is a `hidden beast` number, since 1 + 3 + 624 + 3 + 27 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (136243277) and next prime (136243279).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136243273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3784518 + ... + 3784553.

It is an arithmetic number, because the mean of its divisors is an integer number (24599484).

Almost surely, 2^136243278 is an apocalyptic number.

136243278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136243278 is an abundant number, since it is smaller than the sum of its proper divisors (158950530).

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

136243278 is a wasteful number, since it uses less digits than its factorization.

136243278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7569079 (or 7569076 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 136243278 is about 11672.3295875331. The cubic root of 136243278 is about 514.5627708889.

The spelling of 136243278 in words is "one hundred thirty-six million, two hundred forty-three thousand, two hundred seventy-eight".