71775828 has 48 divisors (see below), whose sum is σ = 187586560. Its totient is φ = 23732352.

The previous prime is 71775791. The next prime is 71775857. The reversal of 71775828 is 82857717.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11100 + ... + 16332.

Almost surely, 2^71775828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71775828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93793280).

71775828 is an abundant number, since it is smaller than the sum of its proper divisors (115810732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71775828 is a wasteful number, since it uses less digits than its factorization.

71775828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373 (or 5365 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 71775828 is about 8472.0616145068. The cubic root of 71775828 is about 415.5845596773.

The spelling of 71775828 in words is "seventy-one million, seven hundred seventy-five thousand, eight hundred twenty-eight".