28645979 has 2 divisors, whose sum is σ = 28645980. Its totient is φ = 28645978.

The previous prime is 28645937. The next prime is 28646021. The reversal of 28645979 is 97954682.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (28645937) and next prime (28646021).

It is a cyclic number.

It is not a de Polignac number, because 28645979 - 2⁸ = 28645723 is a prime.

It is a super-2 number, since 2×28645979² = 1641184225736882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28645909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322989 + 14322990.

It is an arithmetic number, because the mean of its divisors is an integer number (14322990).

Almost surely, 2^28645979 is an apocalyptic number.

28645979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28645979 is an equidigital number, since it uses as much as digits as its factorization.

28645979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 28645979 is about 5352.1938492547. The cubic root of 28645979 is about 305.9763712229.

The spelling of 28645979 in words is "twenty-eight million, six hundred forty-five thousand, nine hundred seventy-nine".