71689880 has 16 divisors (see below), whose sum is σ = 161302320. Its totient is φ = 28675936.

The previous prime is 71689879. The next prime is 71689883. The reversal of 71689880 is 8898617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71689883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896084 + ... + 896163.

It is an arithmetic number, because the mean of its divisors is an integer number (10081395).

Almost surely, 2^71689880 is an apocalyptic number.

It is an amenable number.

71689880 is an abundant number, since it is smaller than the sum of its proper divisors (89612440).

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

71689880 is a wasteful number, since it uses less digits than its factorization.

71689880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792258 (or 1792254 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 71689880 is about 8466.9876579572. The cubic root of 71689880 is about 415.4186127779.

The spelling of 71689880 in words is "seventy-one million, six hundred eighty-nine thousand, eight hundred eighty".