71168728 has 16 divisors (see below), whose sum is σ = 134293680. Its totient is φ = 35357088.

The previous prime is 71168689. The next prime is 71168729. The reversal of 71168728 is 82786117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71168729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27076 + ... + 29587.

It is an arithmetic number, because the mean of its divisors is an integer number (8393355).

Almost surely, 2^71168728 is an apocalyptic number.

It is an amenable number.

71168728 is a deficient number, since it is larger than the sum of its proper divisors (63124952).

71168728 is a wasteful number, since it uses less digits than its factorization.

71168728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56826 (or 56822 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The square root of 71168728 is about 8436.1559966610. The cubic root of 71168728 is about 414.4095304229.

The spelling of 71168728 in words is "seventy-one million, one hundred sixty-eight thousand, seven hundred twenty-eight".