28379251 has 2 divisors, whose sum is σ = 28379252. Its totient is φ = 28379250.

The previous prime is 28379233. The next prime is 28379287. The reversal of 28379251 is 15297382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28379251 - 2⁹ = 28378739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28379251.

It is not a weakly prime, because it can be changed into another prime (28379051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14189625 + 14189626.

It is an arithmetic number, because the mean of its divisors is an integer number (14189626).

Almost surely, 2^28379251 is an apocalyptic number.

28379251 is a deficient number, since it is larger than the sum of its proper divisors (1).

28379251 is an equidigital number, since it uses as much as digits as its factorization.

28379251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 28379251 is about 5327.2179418530. The cubic root of 28379251 is about 305.0237408735.

The spelling of 28379251 in words is "twenty-eight million, three hundred seventy-nine thousand, two hundred fifty-one".