28380683 has 4 divisors (see below), whose sum is σ = 28455168. Its totient is φ = 28306200.

The previous prime is 28380673. The next prime is 28380707. The reversal of 28380683 is 38608382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28380683 - 2⁸ = 28380427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28380613) 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, 36668 + ... + 37433.

It is an arithmetic number, because the mean of its divisors is an integer number (7113792).

Almost surely, 2^28380683 is an apocalyptic number.

28380683 is a deficient number, since it is larger than the sum of its proper divisors (74485).

28380683 is an equidigital number, since it uses as much as digits as its factorization.

28380683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74484.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28380683 is about 5327.3523442701. The cubic root of 28380683 is about 305.0288712256.

The spelling of 28380683 in words is "twenty-eight million, three hundred eighty thousand, six hundred eighty-three".