28535987783 has 4 divisors (see below), whose sum is σ = 29776682928. Its totient is φ = 27295292640.

The previous prime is 28535987773. The next prime is 28535987807. The reversal of 28535987783 is 38778953582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28535987783 - 2¹⁸ = 28535725639 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 (28535987773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620347538 + ... + 620347583.

It is an arithmetic number, because the mean of its divisors is an integer number (7444170732).

Almost surely, 2^28535987783 is an apocalyptic number.

28535987783 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28535987783 is a deficient number, since it is larger than the sum of its proper divisors (1240695145).

28535987783 is a wasteful number, since it uses less digits than its factorization.

28535987783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240695144.

The product of its digits is 101606400, while the sum is 65.

The spelling of 28535987783 in words is "twenty-eight billion, five hundred thirty-five million, nine hundred eighty-seven thousand, seven hundred eighty-three".