71819764 has 12 divisors (see below), whose sum is σ = 133077924. Its totient is φ = 33797504.

The previous prime is 71819743. The next prime is 71819801. The reversal of 71819764 is 46791817.

It can be written as a sum of positive squares in 2 ways, for example, as 66259600 + 5560164 = 8140^2 + 2358^2 .

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 71819764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528019 + ... + 528154.

It is an arithmetic number, because the mean of its divisors is an integer number (11089827).

Almost surely, 2^71819764 is an apocalyptic number.

It is an amenable number.

71819764 is a deficient number, since it is larger than the sum of its proper divisors (61258160).

71819764 is a wasteful number, since it uses less digits than its factorization.

71819764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056194 (or 1056192 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 71819764 is about 8474.6542112348. The cubic root of 71819764 is about 415.6693393743.

The spelling of 71819764 in words is "seventy-one million, eight hundred nineteen thousand, seven hundred sixty-four".