28149474799 has 4 divisors (see below), whose sum is σ = 28150908336. Its totient is φ = 28148041264.

The previous prime is 28149474781. The next prime is 28149474839. The reversal of 28149474799 is 99747494182.

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 28149474799 - 2⁵ = 28149474767 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 28149474799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28149774799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686899 + ... + 726724.

It is an arithmetic number, because the mean of its divisors is an integer number (7037727084).

Almost surely, 2^28149474799 is an apocalyptic number.

28149474799 is a deficient number, since it is larger than the sum of its proper divisors (1433537).

28149474799 is a wasteful number, since it uses less digits than its factorization.

28149474799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433536.

The product of its digits is 36578304, while the sum is 64.

The spelling of 28149474799 in words is "twenty-eight billion, one hundred forty-nine million, four hundred seventy-four thousand, seven hundred ninety-nine".