28730149 has 16 divisors (see below), whose sum is σ = 34693120. Its totient is φ = 23269680.

The previous prime is 28730131. The next prime is 28730161. The reversal of 28730149 is 94103782.

It is not a de Polignac number, because 28730149 - 2⁷ = 28730021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28730129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7792 + ... + 10870.

It is an arithmetic number, because the mean of its divisors is an integer number (2168320).

Almost surely, 2^28730149 is an apocalyptic number.

It is an amenable number.

28730149 is a deficient number, since it is larger than the sum of its proper divisors (5962971).

28730149 is a wasteful number, since it uses less digits than its factorization.

28730149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28730149 is about 5360.0512124419. The cubic root of 28730149 is about 306.2757599323.

The spelling of 28730149 in words is "twenty-eight million, seven hundred thirty thousand, one hundred forty-nine".