71945868 has 36 divisors (see below), whose sum is σ = 173886440. Its totient is φ = 23151744.

The previous prime is 71945851. The next prime is 71945869. The reversal of 71945868 is 86854917.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71945869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6528 + ... + 13656.

Almost surely, 2^71945868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71945868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86943220).

71945868 is an abundant number, since it is smaller than the sum of its proper divisors (101940572).

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

71945868 is a wasteful number, since it uses less digits than its factorization.

71945868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194 (or 7163 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 71945868 is about 8482.0910157814. The cubic root of 71945868 is about 415.9124800475.

The spelling of 71945868 in words is "seventy-one million, nine hundred forty-five thousand, eight hundred sixty-eight".