28979851 has 2 divisors, whose sum is σ = 28979852. Its totient is φ = 28979850.

The previous prime is 28979837. The next prime is 28979861. The reversal of 28979851 is 15897982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28979851 - 2²³ = 20591243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28979795 and 28979804.

It is not a weakly prime, because it can be changed into another prime (28979801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14489925 + 14489926.

It is an arithmetic number, because the mean of its divisors is an integer number (14489926).

Almost surely, 2^28979851 is an apocalyptic number.

28979851 is a deficient number, since it is larger than the sum of its proper divisors (1).

28979851 is an equidigital number, since it uses as much as digits as its factorization.

28979851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 49.

The square root of 28979851 is about 5383.2936943845. The cubic root of 28979851 is about 307.1605119317.

The spelling of 28979851 in words is "twenty-eight million, nine hundred seventy-nine thousand, eight hundred fifty-one".