136869858 has 16 divisors (see below), whose sum is σ = 304155360. Its totient is φ = 45623268.

The previous prime is 136869851. The next prime is 136869881. The reversal of 136869858 is 858968631.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 2534627 = 136869858 / (1 + 3 + 6 + 8 + 6 + 9 + 8 + 5 + 8).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136869851) 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 7 ways as a sum of consecutive naturals, for example, 1267260 + ... + 1267367.

It is an arithmetic number, because the mean of its divisors is an integer number (19009710).

Almost surely, 2^136869858 is an apocalyptic number.

136869858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136869858 is an abundant number, since it is smaller than the sum of its proper divisors (167285502).

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

136869858 is a wasteful number, since it uses less digits than its factorization.

136869858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534638 (or 2534632 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 136869858 is about 11699.1391991035. The cubic root of 136869858 is about 515.3503858698.

The spelling of 136869858 in words is "one hundred thirty-six million, eight hundred sixty-nine thousand, eight hundred fifty-eight".