71028224 has 20 divisors (see below), whose sum is σ = 141918744. Its totient is φ = 35513856.

The previous prime is 71028211. The next prime is 71028253. The reversal of 71028224 is 42282017.

It is a junction number, because it is equal to n+sod(n) for n = 71028193 and 71028202.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 68852 + ... + 69875.

Almost surely, 2^71028224 is an apocalyptic number.

It is an amenable number.

71028224 is a deficient number, since it is larger than the sum of its proper divisors (70890520).

71028224 is an equidigital number, since it uses as much as digits as its factorization.

71028224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138745 (or 138729 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 71028224 is about 8427.8243930447. The cubic root of 71028224 is about 414.1366364246.

The spelling of 71028224 in words is "seventy-one million, twenty-eight thousand, two hundred twenty-four".