71723572 has 12 divisors (see below), whose sum is σ = 125810496. Its totient is φ = 35777720.

The previous prime is 71723569. The next prime is 71723573. The reversal of 71723572 is 27532717.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71723573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19078 + ... + 22525.

It is an arithmetic number, because the mean of its divisors is an integer number (10484208).

Almost surely, 2^71723572 is an apocalyptic number.

It is an amenable number.

71723572 is a deficient number, since it is larger than the sum of its proper divisors (54086924).

71723572 is a wasteful number, since it uses less digits than its factorization.

71723572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42038 (or 42036 counting only the distinct ones).

The product of its digits is 20580, while the sum is 34.

The square root of 71723572 is about 8468.9770338572. The cubic root of 71723572 is about 415.4836805014.

The spelling of 71723572 in words is "seventy-one million, seven hundred twenty-three thousand, five hundred seventy-two".