71447828 has 24 divisors (see below), whose sum is σ = 132323520. Its totient is φ = 33661440.

The previous prime is 71447791. The next prime is 71447833. The reversal of 71447828 is 82874417.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12233 + ... + 17103.

It is an arithmetic number, because the mean of its divisors is an integer number (5513480).

Almost surely, 2^71447828 is an apocalyptic number.

It is an amenable number.

71447828 is a deficient number, since it is larger than the sum of its proper divisors (60875692).

71447828 is a wasteful number, since it uses less digits than its factorization.

71447828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087 (or 5085 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 71447828 is about 8452.6817046426. The cubic root of 71447828 is about 414.9505490988.

The spelling of 71447828 in words is "seventy-one million, four hundred forty-seven thousand, eight hundred twenty-eight".