28198463437 has 4 divisors (see below), whose sum is σ = 28207087456. Its totient is φ = 28189839420.

The previous prime is 28198463413. The next prime is 28198463467. The reversal of 28198463437 is 73436489182.

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 28198463437 - 2¹⁹ = 28197939149 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 (28198463467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4307103 + ... + 4313644.

It is an arithmetic number, because the mean of its divisors is an integer number (7051771864).

Almost surely, 2^28198463437 is an apocalyptic number.

It is an amenable number.

28198463437 is a deficient number, since it is larger than the sum of its proper divisors (8624019).

28198463437 is an equidigital number, since it uses as much as digits as its factorization.

28198463437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624018.

The product of its digits is 6967296, while the sum is 55.

The spelling of 28198463437 in words is "twenty-eight billion, one hundred ninety-eight million, four hundred sixty-three thousand, four hundred thirty-seven".