71304720 has 120 divisors (see below), whose sum is σ = 233574336. Its totient is φ = 17991936.

The previous prime is 71304713. The next prime is 71304733. The reversal of 71304720 is 2740317.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86229 + ... + 87051.

Almost surely, 2^71304720 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 71304720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116787168).

71304720 is an abundant number, since it is smaller than the sum of its proper divisors (162269616).

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

71304720 is a wasteful number, since it uses less digits than its factorization.

71304720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 71304720 is about 8444.2122190291. The cubic root of 71304720 is about 414.6733191426.

The spelling of 71304720 in words is "seventy-one million, three hundred four thousand, seven hundred twenty".