71219828 has 24 divisors (see below), whose sum is σ = 131476800. Its totient is φ = 33663168.

The previous prime is 71219821. The next prime is 71219831. The reversal of 71219828 is 82891217.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 71219791 and 71219800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71219821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54608 + ... + 55896.

It is an arithmetic number, because the mean of its divisors is an integer number (5478200).

Almost surely, 2^71219828 is an apocalyptic number.

It is an amenable number.

71219828 is a deficient number, since it is larger than the sum of its proper divisors (60256972).

71219828 is a wasteful number, since it uses less digits than its factorization.

71219828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039 (or 2037 counting only the distinct ones).

The product of its digits is 16128, while the sum is 38.

The square root of 71219828 is about 8439.1840837844. The cubic root of 71219828 is about 414.5086903645.

The spelling of 71219828 in words is "seventy-one million, two hundred nineteen thousand, eight hundred twenty-eight".