71520648 has 16 divisors (see below), whose sum is σ = 178801680. Its totient is φ = 23840208.

The previous prime is 71520637. The next prime is 71520661. The reversal of 71520648 is 84602517.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489990 + ... + 1490037.

It is an arithmetic number, because the mean of its divisors is an integer number (11175105).

Almost surely, 2^71520648 is an apocalyptic number.

It is an amenable number.

71520648 is an abundant number, since it is smaller than the sum of its proper divisors (107281032).

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

71520648 is a wasteful number, since it uses less digits than its factorization.

71520648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980036 (or 2980032 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 71520648 is about 8456.9881163450. The cubic root of 71520648 is about 415.0914744890.

The spelling of 71520648 in words is "seventy-one million, five hundred twenty thousand, six hundred forty-eight".