28038751864 has 32 divisors (see below), whose sum is σ = 54878469120. Its totient is φ = 13404938976.

The previous prime is 28038751861. The next prime is 28038751889. The reversal of 28038751864 is 46815783082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038751861) 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, 504817 + ... + 557599.

It is an arithmetic number, because the mean of its divisors is an integer number (1714952160).

Almost surely, 2^28038751864 is an apocalyptic number.

It is an amenable number.

28038751864 is a deficient number, since it is larger than the sum of its proper divisors (26839717256).

28038751864 is a wasteful number, since it uses less digits than its factorization.

28038751864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55699 (or 55695 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 28038751864 in words is "twenty-eight billion, thirty-eight million, seven hundred fifty-one thousand, eight hundred sixty-four".