28771976830999 has 16 divisors (see below), whose sum is σ = 28958401873440. Its totient is φ = 28586157880320.

The previous prime is 28771976830979. The next prime is 28771976831009. The reversal of 28771976830999 is 99903867917782.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28771976830999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28771976830979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198342607 + ... + 198487615.

It is an arithmetic number, because the mean of its divisors is an integer number (1809900117090).

Almost surely, 2^{28771976830999} is an apocalyptic number.

28771976830999 is a deficient number, since it is larger than the sum of its proper divisors (186425042441).

28771976830999 is a wasteful number, since it uses less digits than its factorization.

28771976830999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147090.

The product of its (nonzero) digits is 5184974592, while the sum is 85.

The spelling of 28771976830999 in words is "twenty-eight trillion, seven hundred seventy-one billion, nine hundred seventy-six million, eight hundred thirty thousand, nine hundred ninety-nine".