28079399 has 2 divisors, whose sum is σ = 28079400. Its totient is φ = 28079398.

The previous prime is 28079371. The next prime is 28079407. The reversal of 28079399 is 99397082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28079399 - 2¹² = 28075303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28079369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039699 + 14039700.

It is an arithmetic number, because the mean of its divisors is an integer number (14039700).

Almost surely, 2^28079399 is an apocalyptic number.

28079399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28079399 is an equidigital number, since it uses as much as digits as its factorization.

28079399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 28079399 is about 5298.9998112851. Note that the first 3 decimals coincide. The cubic root of 28079399 is about 303.9456526519.

The spelling of 28079399 in words is "twenty-eight million, seventy-nine thousand, three hundred ninety-nine".