71211028 has 24 divisors (see below), whose sum is σ = 150800832. Its totient is φ = 28723584.

The previous prime is 71210987. The next prime is 71211029. The reversal of 71211028 is 82011217.

It is a super-3 number, since 3×71211028³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71211029) 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 7 ways as a sum of consecutive naturals, for example, 74326 + ... + 75277.

It is an arithmetic number, because the mean of its divisors is an integer number (6283368).

Almost surely, 2^71211028 is an apocalyptic number.

It is an amenable number.

71211028 is an abundant number, since it is smaller than the sum of its proper divisors (79589804).

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

71211028 is a wasteful number, since it uses less digits than its factorization.

71211028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149631 (or 149629 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 71211028 is about 8438.6626902608. The cubic root of 71211028 is about 414.4916172786.

The spelling of 71211028 in words is "seventy-one million, two hundred eleven thousand, twenty-eight".