71004728 has 8 divisors (see below), whose sum is σ = 133133880. Its totient is φ = 35502360.

The previous prime is 71004727. The next prime is 71004763. The reversal of 71004728 is 82740017.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 71004728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71004727) 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 as a sum of consecutive naturals, namely, 4437788 + ... + 4437803.

It is an arithmetic number, because the mean of its divisors is an integer number (16641735).

Almost surely, 2^71004728 is an apocalyptic number.

It is an amenable number.

71004728 is a deficient number, since it is larger than the sum of its proper divisors (62129152).

71004728 is a wasteful number, since it uses less digits than its factorization.

71004728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8875597 (or 8875593 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 71004728 is about 8426.4303236899. The cubic root of 71004728 is about 414.0909661872.

The spelling of 71004728 in words is "seventy-one million, four thousand, seven hundred twenty-eight".