71028975 has 72 divisors (see below), whose sum is σ = 130192560. Its totient is φ = 34119680.

The previous prime is 71028953. The next prime is 71028983. The reversal of 71028975 is 57982017.

It is not a de Polignac number, because 71028975 - 2⁵ = 71028943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 628519 + ... + 628631.

It is an arithmetic number, because the mean of its divisors is an integer number (1808230).

Almost surely, 2^71028975 is an apocalyptic number.

71028975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

71028975 is a deficient number, since it is larger than the sum of its proper divisors (59163585).

71028975 is a wasteful number, since it uses less digits than its factorization.

71028975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 71028975 is about 8427.8689477234. The cubic root of 71028975 is about 414.1380960112.

The spelling of 71028975 in words is "seventy-one million, twenty-eight thousand, nine hundred seventy-five".