28766820222001 has 4 divisors (see below), whose sum is σ = 30280863391600. Its totient is φ = 27252777052404.

The previous prime is 28766820221999. The next prime is 28766820222059. The reversal of 28766820222001 is 10022202866782.

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 28766820222001 - 2¹ = 28766820221999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28766820222901) 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, 757021584771 + ... + 757021584808.

It is an arithmetic number, because the mean of its divisors is an integer number (7570215847900).

Almost surely, 2^{28766820222001} is an apocalyptic number.

It is an amenable number.

28766820222001 is a deficient number, since it is larger than the sum of its proper divisors (1514043169599).

28766820222001 is a wasteful number, since it uses less digits than its factorization.

28766820222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514043169598.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 28766820222001 in words is "twenty-eight trillion, seven hundred sixty-six billion, eight hundred twenty million, two hundred twenty-two thousand, one".