28668379 has 2 divisors, whose sum is σ = 28668380. Its totient is φ = 28668378.

The previous prime is 28668371. The next prime is 28668421. The reversal of 28668379 is 97386682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28668379 - 2³ = 28668371 is a prime.

It is not a weakly prime, because it can be changed into another prime (28668371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334189 + 14334190.

It is an arithmetic number, because the mean of its divisors is an integer number (14334190).

Almost surely, 2^28668379 is an apocalyptic number.

28668379 is a deficient number, since it is larger than the sum of its proper divisors (1).

28668379 is an equidigital number, since it uses as much as digits as its factorization.

28668379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 28668379 is about 5354.2860401738. The cubic root of 28668379 is about 306.0561041702.

The spelling of 28668379 in words is "twenty-eight million, six hundred sixty-eight thousand, three hundred seventy-nine".