158917878 has 36 divisors (see below), whose sum is σ = 400540140. Its totient is φ = 45404856.

The previous prime is 158917877. The next prime is 158917931. The reversal of 158917878 is 878719851.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158917877) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 89208 + ... + 90971.

It is an arithmetic number, because the mean of its divisors is an integer number (11126115).

Almost surely, 2^158917878 is an apocalyptic number.

158917878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

158917878 is an abundant number, since it is smaller than the sum of its proper divisors (241622262).

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

158917878 is a wasteful number, since it uses less digits than its factorization.

158917878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180201 (or 180191 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 54.

The square root of 158917878 is about 12606.2634432254. The cubic root of 158917878 is about 541.6568658214.

The spelling of 158917878 in words is "one hundred fifty-eight million, nine hundred seventeen thousand, eight hundred seventy-eight".