28196761247 has 4 divisors (see below), whose sum is σ = 28455447240. Its totient is φ = 27938075256.

The previous prime is 28196761237. The next prime is 28196761259. The reversal of 28196761247 is 74216769182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28196761247 - 2¹⁶ = 28196695711 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 (28196761217) 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, 129342833 + ... + 129343050.

It is an arithmetic number, because the mean of its divisors is an integer number (7113861810).

Almost surely, 2^28196761247 is an apocalyptic number.

28196761247 is a deficient number, since it is larger than the sum of its proper divisors (258685993).

28196761247 is a wasteful number, since it uses less digits than its factorization.

28196761247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258685992.

The product of its digits is 2032128, while the sum is 53.

The spelling of 28196761247 in words is "twenty-eight billion, one hundred ninety-six million, seven hundred sixty-one thousand, two hundred forty-seven".