28642079 has 2 divisors, whose sum is σ = 28642080. Its totient is φ = 28642078.

The previous prime is 28642057. The next prime is 28642091. The reversal of 28642079 is 97024682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28642079 - 2²⁴ = 11864863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28642099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14321039 + 14321040.

It is an arithmetic number, because the mean of its divisors is an integer number (14321040).

Almost surely, 2^28642079 is an apocalyptic number.

28642079 is a deficient number, since it is larger than the sum of its proper divisors (1).

28642079 is an equidigital number, since it uses as much as digits as its factorization.

28642079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 28642079 is about 5351.8295002737. The cubic root of 28642079 is about 305.9624848992.

The spelling of 28642079 in words is "twenty-eight million, six hundred forty-two thousand, seventy-nine".