71389128 has 16 divisors (see below), whose sum is σ = 178472880. Its totient is φ = 23796368.

The previous prime is 71389127. The next prime is 71389133. The reversal of 71389128 is 82198317.

It is not an unprimeable number, because it can be changed into a prime (71389127) 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, 1487250 + ... + 1487297.

It is an arithmetic number, because the mean of its divisors is an integer number (11154555).

Almost surely, 2^71389128 is an apocalyptic number.

It is an amenable number.

71389128 is an abundant number, since it is smaller than the sum of its proper divisors (107083752).

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

71389128 is a wasteful number, since it uses less digits than its factorization.

71389128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974556 (or 2974552 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 71389128 is about 8449.2087203477. The cubic root of 71389128 is about 414.8368798125.

It can be divided in two parts, 71389 and 128, that added together give a palindrome (71517).

The spelling of 71389128 in words is "seventy-one million, three hundred eighty-nine thousand, one hundred twenty-eight".