71786228 has 6 divisors (see below), whose sum is σ = 125625906. Its totient is φ = 35893112.

The previous prime is 71786213. The next prime is 71786261. The reversal of 71786228 is 82268717.

It can be written as a sum of positive squares in only one way, i.e., 63329764 + 8456464 = 7958^2 + 2908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8973275 + ... + 8973282.

It is an arithmetic number, because the mean of its divisors is an integer number (20937651).

Almost surely, 2^71786228 is an apocalyptic number.

It is an amenable number.

71786228 is a deficient number, since it is larger than the sum of its proper divisors (53839678).

71786228 is a wasteful number, since it uses less digits than its factorization.

71786228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17946561 (or 17946559 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 71786228 is about 8472.6753744021. The cubic root of 71786228 is about 415.6046308294.

The spelling of 71786228 in words is "seventy-one million, seven hundred eighty-six thousand, two hundred twenty-eight".