71989158 has 16 divisors (see below), whose sum is σ = 146695536. Its totient is φ = 23543520.

The previous prime is 71989147. The next prime is 71989171. The reversal of 71989158 is 85198917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112873 + ... + 113508.

It is an arithmetic number, because the mean of its divisors is an integer number (9168471).

Almost surely, 2^71989158 is an apocalyptic number.

71989158 is an abundant number, since it is smaller than the sum of its proper divisors (74706378).

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

71989158 is a wasteful number, since it uses less digits than its factorization.

71989158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226439.

The product of its digits is 181440, while the sum is 48.

The square root of 71989158 is about 8484.6424792091. The cubic root of 71989158 is about 415.9958818318.

The spelling of 71989158 in words is "seventy-one million, nine hundred eighty-nine thousand, one hundred fifty-eight".