28250737 has 8 divisors (see below), whose sum is σ = 28723136. Its totient is φ = 27782352.

The previous prime is 28250731. The next prime is 28250773. The reversal of 28250737 is 73705282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28250737 - 2¹⁹ = 27726449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28250731) 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 7 ways as a sum of consecutive naturals, for example, 15298 + ... + 17044.

It is an arithmetic number, because the mean of its divisors is an integer number (3590392).

Almost surely, 2^28250737 is an apocalyptic number.

It is an amenable number.

28250737 is a deficient number, since it is larger than the sum of its proper divisors (472399).

28250737 is a wasteful number, since it uses less digits than its factorization.

28250737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 28250737 is about 5315.1422370431. The cubic root of 28250737 is about 304.5626159267.

The spelling of 28250737 in words is "twenty-eight million, two hundred fifty thousand, seven hundred thirty-seven".