28420967 has 2 divisors, whose sum is σ = 28420968. Its totient is φ = 28420966.

The previous prime is 28420963. The next prime is 28420999. The reversal of 28420967 is 76902482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28420967 - 2² = 28420963 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28420967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28420963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14210483 + 14210484.

It is an arithmetic number, because the mean of its divisors is an integer number (14210484).

Almost surely, 2^28420967 is an apocalyptic number.

28420967 is a deficient number, since it is larger than the sum of its proper divisors (1).

28420967 is an equidigital number, since it uses as much as digits as its factorization.

28420967 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28420967 is about 5331.1318685622. The cubic root of 28420967 is about 305.1731239649.

The spelling of 28420967 in words is "twenty-eight million, four hundred twenty thousand, nine hundred sixty-seven".