28250849 has 4 divisors (see below), whose sum is σ = 30819120. Its totient is φ = 25682580.

The previous prime is 28250837. The next prime is 28250861. The reversal of 28250849 is 94805282.

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 an interprime number because it is at equal distance from previous prime (28250837) and next prime (28250861).

It is not a de Polignac number, because 28250849 - 2¹² = 28246753 is a prime.

It is a super-2 number, since 2×28250849² = 1596220938441602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28250809) 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 3 ways as a sum of consecutive naturals, for example, 1284119 + ... + 1284140.

It is an arithmetic number, because the mean of its divisors is an integer number (7704780).

Almost surely, 2^28250849 is an apocalyptic number.

It is an amenable number.

28250849 is a deficient number, since it is larger than the sum of its proper divisors (2568271).

28250849 is a wasteful number, since it uses less digits than its factorization.

28250849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568270.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28250849 is about 5315.1527729690. The cubic root of 28250849 is about 304.5630184055.

The spelling of 28250849 in words is "twenty-eight million, two hundred fifty thousand, eight hundred forty-nine".