71128029 has 16 divisors (see below), whose sum is σ = 113098752. Its totient is φ = 38877168.

The previous prime is 71128021. The next prime is 71128037. The reversal of 71128029 is 92082117.

It is an interprime number because it is at equal distance from previous prime (71128021) and next prime (71128037).

It is not a de Polignac number, because 71128029 - 2³ = 71128021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71127987 and 71128005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71128021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73149 + ... + 74114.

It is an arithmetic number, because the mean of its divisors is an integer number (7068672).

Almost surely, 2^71128029 is an apocalyptic number.

It is an amenable number.

71128029 is a deficient number, since it is larger than the sum of its proper divisors (41970723).

71128029 is a wasteful number, since it uses less digits than its factorization.

71128029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147296.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 71128029 is about 8433.7434748752. The cubic root of 71128029 is about 414.3305197393.

The spelling of 71128029 in words is "seventy-one million, one hundred twenty-eight thousand, twenty-nine".