28361201287 has 8 divisors (see below), whose sum is σ = 28719381600. Its totient is φ = 28003899264.

The previous prime is 28361201279. The next prime is 28361201321. The reversal of 28361201287 is 78210216382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28361201287 - 2³ = 28361201279 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 (28361201087) 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 in 7 ways as a sum of consecutive naturals, for example, 154462 + ... + 283867.

It is an arithmetic number, because the mean of its divisors is an integer number (3589922700).

Almost surely, 2^28361201287 is an apocalyptic number.

28361201287 is a deficient number, since it is larger than the sum of its proper divisors (358180313).

28361201287 is an equidigital number, since it uses as much as digits as its factorization.

28361201287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439145.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 28361201287 in words is "twenty-eight billion, three hundred sixty-one million, two hundred one thousand, two hundred eighty-seven".