28830091 has 2 divisors, whose sum is σ = 28830092. Its totient is φ = 28830090.

The previous prime is 28830083. The next prime is 28830101. The reversal of 28830091 is 19003882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28830091 - 2³ = 28830083 is a prime.

It is a super-3 number, since 3×28830091³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28830071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14415045 + 14415046.

It is an arithmetic number, because the mean of its divisors is an integer number (14415046).

Almost surely, 2^28830091 is an apocalyptic number.

28830091 is a deficient number, since it is larger than the sum of its proper divisors (1).

28830091 is an equidigital number, since it uses as much as digits as its factorization.

28830091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 28830091 is about 5369.3659774688. The cubic root of 28830091 is about 306.6304905079.

The spelling of 28830091 in words is "twenty-eight million, eight hundred thirty thousand, ninety-one".