71028428 has 12 divisors (see below), whose sum is σ = 124410720. Its totient is φ = 35482512.

The previous prime is 71028407. The next prime is 71028443. The reversal of 71028428 is 82482017.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71028394 and 71028403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 12171.

It is an arithmetic number, because the mean of its divisors is an integer number (10367560).

Almost surely, 2^71028428 is an apocalyptic number.

It is an amenable number.

71028428 is a deficient number, since it is larger than the sum of its proper divisors (53382292).

71028428 is a wasteful number, since it uses less digits than its factorization.

71028428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15856 (or 15854 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 71028428 is about 8427.8364958037. The cubic root of 71028428 is about 414.1370329046.

The spelling of 71028428 in words is "seventy-one million, twenty-eight thousand, four hundred twenty-eight".