28093397 has 8 divisors (see below), whose sum is σ = 28972416. Its totient is φ = 27220752.

The previous prime is 28093391. The next prime is 28093411. The reversal of 28093397 is 79339082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28093397 - 2¹⁶ = 28027861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28093391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8288 + ... + 11174.

It is an arithmetic number, because the mean of its divisors is an integer number (3621552).

Almost surely, 2^28093397 is an apocalyptic number.

It is an amenable number.

28093397 is a deficient number, since it is larger than the sum of its proper divisors (879019).

28093397 is a wasteful number, since it uses less digits than its factorization.

28093397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 28093397 is about 5300.3204620098. The cubic root of 28093397 is about 303.9961514113.

The spelling of 28093397 in words is "twenty-eight million, ninety-three thousand, three hundred ninety-seven".