71520384 has 64 divisors (see below), whose sum is σ = 204603840. Its totient is φ = 22004736.

The previous prime is 71520341. The next prime is 71520391. The reversal of 71520384 is 48302517.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2172 + ... + 12155.

It is an arithmetic number, because the mean of its divisors is an integer number (3196935).

Almost surely, 2^71520384 is an apocalyptic number.

It is an amenable number.

71520384 is an abundant number, since it is smaller than the sum of its proper divisors (133083456).

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

71520384 is a wasteful number, since it uses less digits than its factorization.

71520384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14357 (or 14345 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 71520384 is about 8456.9725079369. The cubic root of 71520384 is about 415.0909637540.

The spelling of 71520384 in words is "seventy-one million, five hundred twenty thousand, three hundred eighty-four".