28383307 has 4 divisors (see below), whose sum is σ = 28864440. Its totient is φ = 27902176.

The previous prime is 28383281. The next prime is 28383371. The reversal of 28383307 is 70338382.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70338382 = 2 ⋅35169191.

It is a cyclic number.

It is not a de Polignac number, because 28383307 - 2¹¹ = 28381259 is a prime.

It is a super-2 number, since 2×28383307² = 1611224232512498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28383907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240478 + ... + 240595.

It is an arithmetic number, because the mean of its divisors is an integer number (7216110).

Almost surely, 2^28383307 is an apocalyptic number.

28383307 is a deficient number, since it is larger than the sum of its proper divisors (481133).

28383307 is an equidigital number, since it uses as much as digits as its factorization.

28383307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481132.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 28383307 is about 5327.5986147607. The cubic root of 28383307 is about 305.0382716464.

The spelling of 28383307 in words is "twenty-eight million, three hundred eighty-three thousand, three hundred seven".