28078756201 has 4 divisors (see below), whose sum is σ = 29299571712. Its totient is φ = 26857940692.

The previous prime is 28078756193. The next prime is 28078756241. The reversal of 28078756201 is 10265787082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28078756201 - 2³ = 28078756193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28078756241) 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 3 ways as a sum of consecutive naturals, for example, 610407721 + ... + 610407766.

It is an arithmetic number, because the mean of its divisors is an integer number (7324892928).

Almost surely, 2^28078756201 is an apocalyptic number.

It is an amenable number.

28078756201 is a deficient number, since it is larger than the sum of its proper divisors (1220815511).

28078756201 is a wasteful number, since it uses less digits than its factorization.

28078756201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220815510.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 28078756201 in words is "twenty-eight billion, seventy-eight million, seven hundred fifty-six thousand, two hundred one".