28379929 has 2 divisors, whose sum is σ = 28379930. Its totient is φ = 28379928.

The previous prime is 28379921. The next prime is 28379947. The reversal of 28379929 is 92997382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 3429904 = 4995^2 + 1852^2 .

It is a cyclic number.

It is not a de Polignac number, because 28379929 - 2³ = 28379921 is a prime.

It is not a weakly prime, because it can be changed into another prime (28379921) 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, 14189964 + 14189965.

It is an arithmetic number, because the mean of its divisors is an integer number (14189965).

Almost surely, 2^28379929 is an apocalyptic number.

It is an amenable number.

28379929 is a deficient number, since it is larger than the sum of its proper divisors (1).

28379929 is an equidigital number, since it uses as much as digits as its factorization.

28379929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 28379929 is about 5327.2815769396. The cubic root of 28379929 is about 305.0261699304.

The spelling of 28379929 in words is "twenty-eight million, three hundred seventy-nine thousand, nine hundred twenty-nine".