71791028 has 12 divisors (see below), whose sum is σ = 126175140. Its totient is φ = 35740992.

The previous prime is 71791019. The next prime is 71791033. The reversal of 71791028 is 82019717.

It can be written as a sum of positive squares in 2 ways, for example, as 39664804 + 32126224 = 6298^2 + 5668^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37583 + ... + 39446.

It is an arithmetic number, because the mean of its divisors is an integer number (10514595).

Almost surely, 2^71791028 is an apocalyptic number.

It is an amenable number.

71791028 is a deficient number, since it is larger than the sum of its proper divisors (54384112).

71791028 is a wasteful number, since it uses less digits than its factorization.

71791028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77266 (or 77264 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 71791028 is about 8472.9586332048. The cubic root of 71791028 is about 415.6138937843.

The spelling of 71791028 in words is "seventy-one million, seven hundred ninety-one thousand, twenty-eight".