28298707 has 4 divisors (see below), whose sum is σ = 28616760. Its totient is φ = 27980656.

The previous prime is 28298663. The next prime is 28298713. The reversal of 28298707 is 70789282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70789282 = 2 ⋅35394641.

It is a cyclic number.

It is not a de Polignac number, because 28298707 - 2¹¹ = 28296659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28298737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158893 + ... + 159070.

It is an arithmetic number, because the mean of its divisors is an integer number (7154190).

Almost surely, 2^28298707 is an apocalyptic number.

28298707 is a deficient number, since it is larger than the sum of its proper divisors (318053).

28298707 is an equidigital number, since it uses as much as digits as its factorization.

28298707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318052.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 28298707 is about 5319.6529022108. The cubic root of 28298707 is about 304.7349017831.

It can be divided in two parts, 282 and 98707, that added together give a palindrome (98989).

The spelling of 28298707 in words is "twenty-eight million, two hundred ninety-eight thousand, seven hundred seven".