28418093 has 4 divisors (see below), whose sum is σ = 31001568. Its totient is φ = 25834620.

The previous prime is 28418077. The next prime is 28418107. The reversal of 28418093 is 39081482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28418093 - 2⁴ = 28418077 is a prime.

It is a super-3 number, since 3×28418093³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28418293) 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, 1291721 + ... + 1291742.

It is an arithmetic number, because the mean of its divisors is an integer number (7750392).

Almost surely, 2^28418093 is an apocalyptic number.

It is an amenable number.

28418093 is a deficient number, since it is larger than the sum of its proper divisors (2583475).

28418093 is a wasteful number, since it uses less digits than its factorization.

28418093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583474.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28418093 is about 5330.8623129846. The cubic root of 28418093 is about 305.1628369924.

The spelling of 28418093 in words is "twenty-eight million, four hundred eighteen thousand, ninety-three".