28918293 has 8 divisors (see below), whose sum is σ = 39086208. Its totient is φ = 19014624.

The previous prime is 28918277. The next prime is 28918333. The reversal of 28918293 is 39281982.

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

It is not a de Polignac number, because 28918293 - 2⁴ = 28918277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28918213) 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 7 ways as a sum of consecutive naturals, for example, 65805 + ... + 66242.

It is an arithmetic number, because the mean of its divisors is an integer number (4885776).

Almost surely, 2^28918293 is an apocalyptic number.

It is an amenable number.

28918293 is a deficient number, since it is larger than the sum of its proper divisors (10167915).

28918293 is a wasteful number, since it uses less digits than its factorization.

28918293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132123.

The product of its digits is 62208, while the sum is 42.

The square root of 28918293 is about 5377.5731515248. The cubic root of 28918293 is about 306.9428711686.

The spelling of 28918293 in words is "twenty-eight million, nine hundred eighteen thousand, two hundred ninety-three".