158778 has 12 divisors (see below), whose sum is σ = 344058. Its totient is φ = 52920.

The previous prime is 158777. The next prime is 158791. The reversal of 158778 is 877851.

158778 is a `hidden beast` number, since 1 + 587 + 78 = 666.

158778 is nontrivially palindromic in base 14.

158778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 127449 + 31329 = 357^2 + 177^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (158771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4393 + ... + 4428.

2¹⁵⁸⁷⁷⁸ is an apocalyptic number.

158778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

158778 is an abundant number, since it is smaller than the sum of its proper divisors (185280).

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

158778 is a wasteful number, since it uses less digits than its factorization.

158778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8829 (or 8826 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 158778 is about 398.4695722386. The cubic root of 158778 is about 54.1497898770.

The spelling of 158778 in words is "one hundred fifty-eight thousand, seven hundred seventy-eight".