28782921118 has 32 divisors (see below), whose sum is σ = 49714940160. Its totient is φ = 12242612160.

The previous prime is 28782921103. The next prime is 28782921127. The reversal of 28782921118 is 81112928782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1299658 + ... + 1321618.

It is an arithmetic number, because the mean of its divisors is an integer number (1553591880).

Almost surely, 2^28782921118 is an apocalyptic number.

28782921118 is a deficient number, since it is larger than the sum of its proper divisors (20932019042).

28782921118 is a wasteful number, since it uses less digits than its factorization.

28782921118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22672.

The product of its digits is 258048, while the sum is 49.

The spelling of 28782921118 in words is "twenty-eight billion, seven hundred eighty-two million, nine hundred twenty-one thousand, one hundred eighteen".