71706072 has 16 divisors (see below), whose sum is σ = 179265240. Its totient is φ = 23902016.

The previous prime is 71706053. The next prime is 71706073. The reversal of 71706072 is 27060717.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71706073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493853 + ... + 1493900.

Almost surely, 2^71706072 is an apocalyptic number.

It is an amenable number.

71706072 is an abundant number, since it is smaller than the sum of its proper divisors (107559168).

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

71706072 is a wasteful number, since it uses less digits than its factorization.

71706072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987762 (or 2987758 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 71706072 is about 8467.9437881932. The cubic root of 71706072 is about 415.4498861451.

Adding to 71706072 its reverse (27060717), we get a palindrome (98766789).

The spelling of 71706072 in words is "seventy-one million, seven hundred six thousand, seventy-two".