158678 has 16 divisors (see below), whose sum is σ = 272160. Its totient is φ = 68736.

The previous prime is 158663. The next prime is 158699. The reversal of 158678 is 876851.

158678 = T₅₂ + T₅₃ + ... + T₁₀₂.

It is a happy number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

158678 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (17010).

2¹⁵⁸⁶⁷⁸ is an apocalyptic number.

158678 is a deficient number, since it is larger than the sum of its proper divisors (113482).

158678 is a wasteful number, since it uses less digits than its factorization.

158678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

The product of its digits is 13440, while the sum is 35.

The square root of 158678 is about 398.3440723796. The cubic root of 158678 is about 54.1384194600.

The spelling of 158678 in words is "one hundred fifty-eight thousand, six hundred seventy-eight".