71138828 has 12 divisors (see below), whose sum is σ = 125015520. Its totient is φ = 35420112.

The previous prime is 71138819. The next prime is 71138887. The reversal of 71138828 is 82883117.

It is a junction number, because it is equal to n+sod(n) for n = 71138791 and 71138800.

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, 36251 + ... + 38162.

It is an arithmetic number, because the mean of its divisors is an integer number (10417960).

Almost surely, 2^71138828 is an apocalyptic number.

It is an amenable number.

71138828 is a deficient number, since it is larger than the sum of its proper divisors (53876692).

71138828 is a wasteful number, since it uses less digits than its factorization.

71138828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74656 (or 74654 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 71138828 is about 8434.3836763572. The cubic root of 71138828 is about 414.3514872300.

The spelling of 71138828 in words is "seventy-one million, one hundred thirty-eight thousand, eight hundred twenty-eight".