28520419687 has 2 divisors, whose sum is σ = 28520419688. Its totient is φ = 28520419686.

The previous prime is 28520419673. The next prime is 28520419717. The reversal of 28520419687 is 78691402582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28520419687 - 2¹⁵ = 28520386919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28520419667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14260209843 + 14260209844.

It is an arithmetic number, because the mean of its divisors is an integer number (14260209844).

Almost surely, 2^28520419687 is an apocalyptic number.

28520419687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28520419687 is an equidigital number, since it uses as much as digits as its factorization.

28520419687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 28520419687 in words is "twenty-eight billion, five hundred twenty million, four hundred nineteen thousand, six hundred eighty-seven".