28364149 has 4 divisors (see below), whose sum is σ = 30942720. Its totient is φ = 25785580.

The previous prime is 28364113. The next prime is 28364153. The reversal of 28364149 is 94146382.

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 28364149 - 2¹⁷ = 28233077 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 (28362149) 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, 1289269 + ... + 1289290.

It is an arithmetic number, because the mean of its divisors is an integer number (7735680).

Almost surely, 2^28364149 is an apocalyptic number.

It is an amenable number.

28364149 is a deficient number, since it is larger than the sum of its proper divisors (2578571).

28364149 is a wasteful number, since it uses less digits than its factorization.

28364149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578570.

The product of its digits is 41472, while the sum is 37.

The square root of 28364149 is about 5325.8003154456. The cubic root of 28364149 is about 304.9696252112.

The spelling of 28364149 in words is "twenty-eight million, three hundred sixty-four thousand, one hundred forty-nine".