28287480197 has 4 divisors (see below), whose sum is σ = 28323424416. Its totient is φ = 28251535980.

The previous prime is 28287480187. The next prime is 28287480209. The reversal of 28287480197 is 79108478282.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79108478282 = 2 ⋅39554239141.

It is a cyclic number.

It is not a de Polignac number, because 28287480197 - 2¹² = 28287476101 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 (28287480127) 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, 17970929 + ... + 17972502.

It is an arithmetic number, because the mean of its divisors is an integer number (7080856104).

Almost surely, 2^28287480197 is an apocalyptic number.

It is an amenable number.

28287480197 is a deficient number, since it is larger than the sum of its proper divisors (35944219).

28287480197 is an equidigital number, since it uses as much as digits as its factorization.

28287480197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35944218.

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 28287480197 in words is "twenty-eight billion, two hundred eighty-seven million, four hundred eighty thousand, one hundred ninety-seven".