28950979 has 2 divisors, whose sum is σ = 28950980. Its totient is φ = 28950978.

The previous prime is 28950973. The next prime is 28950989. The reversal of 28950979 is 97905982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28950979 - 2¹³ = 28942787 is a prime.

It is not a weakly prime, because it can be changed into another prime (28950973) 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, 14475489 + 14475490.

It is an arithmetic number, because the mean of its divisors is an integer number (14475490).

Almost surely, 2^28950979 is an apocalyptic number.

28950979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28950979 is an equidigital number, since it uses as much as digits as its factorization.

28950979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 28950979 is about 5380.6113964865. The cubic root of 28950979 is about 307.0584722416.

It can be divided in two parts, 28950 and 979, that added together give a square (29929 = 173²).

The spelling of 28950979 in words is "twenty-eight million, nine hundred fifty thousand, nine hundred seventy-nine".