71564930 has 16 divisors (see below), whose sum is σ = 129311424. Its totient is φ = 28516080.

The previous prime is 71564929. The next prime is 71564939. The reversal of 71564930 is 3946517.

It is not an unprimeable number, because it can be changed into a prime (71564939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10976 + ... + 16235.

It is an arithmetic number, because the mean of its divisors is an integer number (8081964).

Almost surely, 2^71564930 is an apocalyptic number.

71564930 is a deficient number, since it is larger than the sum of its proper divisors (57746494).

71564930 is a wasteful number, since it uses less digits than its factorization.

71564930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27481.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 71564930 is about 8459.6057827774. The cubic root of 71564930 is about 415.1771247590.

The spelling of 71564930 in words is "seventy-one million, five hundred sixty-four thousand, nine hundred thirty".