71898858 has 48 divisors (see below), whose sum is σ = 161740800. Its totient is φ = 23058720.

The previous prime is 71898857. The next prime is 71898863. The reversal of 71898858 is 85889817.

It is not an unprimeable number, because it can be changed into a prime (71898857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149863 + ... + 150341.

It is an arithmetic number, because the mean of its divisors is an integer number (3369600).

Almost surely, 2^71898858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71898858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80870400).

71898858 is an abundant number, since it is smaller than the sum of its proper divisors (89841942).

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

71898858 is a wasteful number, since it uses less digits than its factorization.

71898858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 784 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The square root of 71898858 is about 8479.3194302373. The cubic root of 71898858 is about 415.8218734741.

The spelling of 71898858 in words is "seventy-one million, eight hundred ninety-eight thousand, eight hundred fifty-eight".