28390066201 has 4 divisors (see below), whose sum is σ = 32445789952. Its totient is φ = 24334342452.

The previous prime is 28390066189. The next prime is 28390066213. The reversal of 28390066201 is 10266009382.

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 an interprime number because it is at equal distance from previous prime (28390066189) and next prime (28390066213).

It is not a de Polignac number, because 28390066201 - 2⁹ = 28390065689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28390066501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2027861865 + ... + 2027861878.

It is an arithmetic number, because the mean of its divisors is an integer number (8111447488).

Almost surely, 2^28390066201 is an apocalyptic number.

It is an amenable number.

28390066201 is a deficient number, since it is larger than the sum of its proper divisors (4055723751).

28390066201 is an equidigital number, since it uses as much as digits as its factorization.

28390066201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055723750.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 28390066201 in words is "twenty-eight billion, three hundred ninety million, sixty-six thousand, two hundred one".