28038721850 has 24 divisors (see below), whose sum is σ = 53261644608. Its totient is φ = 10976860400.

The previous prime is 28038721847. The next prime is 28038721859. The reversal of 28038721850 is 5812783082.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28038721859) 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 11 ways as a sum of consecutive naturals, for example, 5963336 + ... + 5968035.

It is an arithmetic number, because the mean of its divisors is an integer number (2219235192).

Almost surely, 2^28038721850 is an apocalyptic number.

28038721850 is a deficient number, since it is larger than the sum of its proper divisors (25222922758).

28038721850 is a wasteful number, since it uses less digits than its factorization.

28038721850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11931430 (or 11931425 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 28038721850 in words is "twenty-eight billion, thirty-eight million, seven hundred twenty-one thousand, eight hundred fifty".