71861412 has 48 divisors (see below), whose sum is σ = 192886400. Its totient is φ = 20397312.

The previous prime is 71861393. The next prime is 71861423. The reversal of 71861412 is 21416817.

It is a self number, because there is not a number n which added to its sum of digits gives 71861412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10464 + ... + 15912.

Almost surely, 2^71861412 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 71861412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96443200).

71861412 is an abundant number, since it is smaller than the sum of its proper divisors (121024988).

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

71861412 is a wasteful number, since it uses less digits than its factorization.

71861412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620 (or 5618 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 71861412 is about 8477.1110645078. Note that the first 3 decimals coincide. The cubic root of 71861412 is about 415.7496721890.

The spelling of 71861412 in words is "seventy-one million, eight hundred sixty-one thousand, four hundred twelve".