71673856 has 48 divisors (see below), whose sum is σ = 145454400. Its totient is φ = 35303424.

The previous prime is 71673851. The next prime is 71673857. The reversal of 71673856 is 65837617.

It is not an unprimeable number, because it can be changed into a prime (71673851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161571 + ... + 162013.

It is an arithmetic number, because the mean of its divisors is an integer number (3030300).

Almost surely, 2^71673856 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 71673856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72727200).

71673856 is an abundant number, since it is smaller than the sum of its proper divisors (73780544).

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

71673856 is an equidigital number, since it uses as much as digits as its factorization.

71673856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 524 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 71673856 is about 8466.0413417370. The cubic root of 71673856 is about 415.3876592510.

The spelling of 71673856 in words is "seventy-one million, six hundred seventy-three thousand, eight hundred fifty-six".