28890893 has 2 divisors, whose sum is σ = 28890894. Its totient is φ = 28890892.

The previous prime is 28890863. The next prime is 28890907. The reversal of 28890893 is 39809882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28111204 + 779689 = 5302^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 28890893 - 2¹⁰ = 28889869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28890863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14445446 + 14445447.

It is an arithmetic number, because the mean of its divisors is an integer number (14445447).

Almost surely, 2^28890893 is an apocalyptic number.

It is an amenable number.

28890893 is a deficient number, since it is larger than the sum of its proper divisors (1).

28890893 is an equidigital number, since it uses as much as digits as its factorization.

28890893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 28890893 is about 5375.0249301747. The cubic root of 28890893 is about 306.8458980371.

The spelling of 28890893 in words is "twenty-eight million, eight hundred ninety thousand, eight hundred ninety-three".