28058779 has 4 divisors (see below), whose sum is σ = 32067184. Its totient is φ = 24050376.

The previous prime is 28058773. The next prime is 28058803. The reversal of 28058779 is 97785082.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28058779 - 2⁹ = 28058267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28058773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004192 + ... + 2004205.

It is an arithmetic number, because the mean of its divisors is an integer number (8016796).

Almost surely, 2^28058779 is an apocalyptic number.

28058779 is a deficient number, since it is larger than the sum of its proper divisors (4008405).

28058779 is an equidigital number, since it uses as much as digits as its factorization.

28058779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008404.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 28058779 is about 5297.0538037668. The cubic root of 28058779 is about 303.8712339874.

The spelling of 28058779 in words is "twenty-eight million, fifty-eight thousand, seven hundred seventy-nine".