28290093 has 12 divisors (see below), whose sum is σ = 40845600. Its totient is φ = 17408976.

The previous prime is 28290061. The next prime is 28290103. The reversal of 28290093 is 39009282.

It is not a de Polignac number, because 28290093 - 2⁵ = 28290061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28290593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27393 + ... + 28406.

It is an arithmetic number, because the mean of its divisors is an integer number (3403800).

Almost surely, 2^28290093 is an apocalyptic number.

It is an amenable number.

28290093 is a deficient number, since it is larger than the sum of its proper divisors (12555507).

28290093 is a wasteful number, since it uses less digits than its factorization.

28290093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55828 (or 55815 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 28290093 is about 5318.8432012986. The cubic root of 28290093 is about 304.7039786643.

The spelling of 28290093 in words is "twenty-eight million, two hundred ninety thousand, ninety-three".