71721882 has 16 divisors (see below), whose sum is σ = 159382080. Its totient is φ = 23907276.

The previous prime is 71721869. The next prime is 71721907. The reversal of 71721882 is 28812717.

It is a happy 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, 664038 + ... + 664145.

It is an arithmetic number, because the mean of its divisors is an integer number (9961380).

Almost surely, 2^71721882 is an apocalyptic number.

71721882 is an abundant number, since it is smaller than the sum of its proper divisors (87660198).

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

71721882 is a wasteful number, since it uses less digits than its factorization.

71721882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328194 (or 1328188 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 71721882 is about 8468.8772573465. The cubic root of 71721882 is about 415.4804171719.

The spelling of 71721882 in words is "seventy-one million, seven hundred twenty-one thousand, eight hundred eighty-two".