28029764989 has 2 divisors, whose sum is σ = 28029764990. Its totient is φ = 28029764988.

The previous prime is 28029764981. The next prime is 28029765059. The reversal of 28029764989 is 98946792082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20315656089 + 7714108900 = 142533^2 + 87830^2 .

It is a cyclic number.

It is not a de Polignac number, because 28029764989 - 2³ = 28029764981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28029764989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28029764981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14014882494 + 14014882495.

It is an arithmetic number, because the mean of its divisors is an integer number (14014882495).

Almost surely, 2^28029764989 is an apocalyptic number.

It is an amenable number.

28029764989 is a deficient number, since it is larger than the sum of its proper divisors (1).

28029764989 is an equidigital number, since it uses as much as digits as its factorization.

28029764989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 28029764989 in words is "twenty-eight billion, twenty-nine million, seven hundred sixty-four thousand, nine hundred eighty-nine".