28907516369 has 2 divisors, whose sum is σ = 28907516370. Its totient is φ = 28907516368.

The previous prime is 28907516327. The next prime is 28907516413. The reversal of 28907516369 is 96361570982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27660013969 + 1247502400 = 166313^2 + 35320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28907516369 is a prime.

It is a super-2 number, since 2×28907516369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28907516269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14453758184 + 14453758185.

It is an arithmetic number, because the mean of its divisors is an integer number (14453758185).

Almost surely, 2^28907516369 is an apocalyptic number.

It is an amenable number.

28907516369 is a deficient number, since it is larger than the sum of its proper divisors (1).

28907516369 is an equidigital number, since it uses as much as digits as its factorization.

28907516369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 28907516369 in words is "twenty-eight billion, nine hundred seven million, five hundred sixteen thousand, three hundred sixty-nine".