71671158 has 48 divisors (see below), whose sum is σ = 170417520. Its totient is φ = 21632832.

The previous prime is 71671147. The next prime is 71671177. The reversal of 71671158 is 85117617.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9513 + ... + 15291.

It is an arithmetic number, because the mean of its divisors is an integer number (3550365).

Almost surely, 2^71671158 is an apocalyptic number.

71671158 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71671158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85208760).

71671158 is an abundant number, since it is smaller than the sum of its proper divisors (98746362).

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

71671158 is a wasteful number, since it uses less digits than its factorization.

71671158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853 (or 5850 counting only the distinct ones).

The product of its digits is 11760, while the sum is 36.

The square root of 71671158 is about 8465.8819977602. The cubic root of 71671158 is about 415.3824470764.

The spelling of 71671158 in words is "seventy-one million, six hundred seventy-one thousand, one hundred fifty-eight".