28046847149 has 4 divisors (see below), whose sum is σ = 28047419136. Its totient is φ = 28046275164.

The previous prime is 28046847139. The next prime is 28046847173. The reversal of 28046847149 is 94174864082.

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 28046847149 - 2⁴ = 28046847133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28046847149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28046847139) 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, 204749 + ... + 313074.

It is an arithmetic number, because the mean of its divisors is an integer number (7011854784).

Almost surely, 2^28046847149 is an apocalyptic number.

It is an amenable number.

28046847149 is a deficient number, since it is larger than the sum of its proper divisors (571987).

28046847149 is an equidigital number, since it uses as much as digits as its factorization.

28046847149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571986.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 28046847149 in words is "twenty-eight billion, forty-six million, eight hundred forty-seven thousand, one hundred forty-nine".