28999999999 has 2 divisors, whose sum is σ = 29000000000. Its totient is φ = 28999999998.

The previous prime is 28999999979. The next prime is 29000000009. The reversal of 28999999999 is 99999999982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28999999999 - 2¹⁵ = 28999967231 is a prime.

28999999999 is a modest number, since divided by 999999 gives 28999 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28999999909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14499999999 + 14500000000.

It is an arithmetic number, because the mean of its divisors is an integer number (14500000000).

Almost surely, 2^28999999999 is an apocalyptic number.

28999999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28999999999 is an equidigital number, since it uses as much as digits as its factorization.

28999999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6198727824, while the sum is 91.

It can be divided in two parts, 28 and 999999999, that multiplied together give a palindrome (27999999972).

The spelling of 28999999999 in words is "twenty-eight billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".