28093407 has 4 divisors (see below), whose sum is σ = 37457880. Its totient is φ = 18728936.

The previous prime is 28093391. The next prime is 28093411. The reversal of 28093407 is 70439082.

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 28093407 - 2⁴ = 28093391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28093447) 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, 4682232 + ... + 4682237.

It is an arithmetic number, because the mean of its divisors is an integer number (9364470).

Almost surely, 2^28093407 is an apocalyptic number.

28093407 is a deficient number, since it is larger than the sum of its proper divisors (9364473).

28093407 is an equidigital number, since it uses as much as digits as its factorization.

28093407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9364472.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28093407 is about 5300.3214053489. The cubic root of 28093407 is about 303.9961874810.

It can be divided in two parts, 2809 and 3407, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 28093407 in words is "twenty-eight million, ninety-three thousand, four hundred seven".