28108379 has 4 divisors (see below), whose sum is σ = 30270576. Its totient is φ = 25946184.

The previous prime is 28108343. The next prime is 28108393. The reversal of 28108379 is 97380182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28108379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28108319) 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, 1081079 + ... + 1081104.

It is an arithmetic number, because the mean of its divisors is an integer number (7567644).

Almost surely, 2^28108379 is an apocalyptic number.

28108379 is a deficient number, since it is larger than the sum of its proper divisors (2162197).

28108379 is a wasteful number, since it uses less digits than its factorization.

28108379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162196.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 28108379 is about 5301.7335844043. The cubic root of 28108379 is about 304.0501814379.

The spelling of 28108379 in words is "twenty-eight million, one hundred eight thousand, three hundred seventy-nine".