28751640004 has 24 divisors (see below), whose sum is σ = 50593213440. Its totient is φ = 14296487424.

The previous prime is 28751639993. The next prime is 28751640007. The reversal of 28751640004 is 40004615782.

It is a super-2 number, since 2×28751640004² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28751640007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3626757 + ... + 3634675.

It is an arithmetic number, because the mean of its divisors is an integer number (2108050560).

Almost surely, 2^28751640004 is an apocalyptic number.

It is an amenable number.

28751640004 is a deficient number, since it is larger than the sum of its proper divisors (21841573436).

28751640004 is a wasteful number, since it uses less digits than its factorization.

28751640004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12819 (or 12817 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 28751640004 in words is "twenty-eight billion, seven hundred fifty-one million, six hundred forty thousand, four".