28250745 has 8 divisors (see below), whose sum is σ = 45201216. Its totient is φ = 15067056.

The previous prime is 28250731. The next prime is 28250773. The reversal of 28250745 is 54705282.

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

It is not a de Polignac number, because 28250745 - 2¹⁰ = 28249721 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 941677 + ... + 941706.

It is an arithmetic number, because the mean of its divisors is an integer number (5650152).

Almost surely, 2^28250745 is an apocalyptic number.

It is an amenable number.

28250745 is a deficient number, since it is larger than the sum of its proper divisors (16950471).

28250745 is a wasteful number, since it uses less digits than its factorization.

28250745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883391.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 28250745 is about 5315.1429896100. The cubic root of 28250745 is about 304.5626446753.

The spelling of 28250745 in words is "twenty-eight million, two hundred fifty thousand, seven hundred forty-five".