28420867 has 2 divisors, whose sum is σ = 28420868. Its totient is φ = 28420866.

The previous prime is 28420849. The next prime is 28420883. The reversal of 28420867 is 76802482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28420867 - 2⁷ = 28420739 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28420817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14210433 + 14210434.

It is an arithmetic number, because the mean of its divisors is an integer number (14210434).

Almost surely, 2^28420867 is an apocalyptic number.

28420867 is a deficient number, since it is larger than the sum of its proper divisors (1).

28420867 is an equidigital number, since it uses as much as digits as its factorization.

28420867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 28420867 is about 5331.1224896826. The cubic root of 28420867 is about 305.1727660443.

The spelling of 28420867 in words is "twenty-eight million, four hundred twenty thousand, eight hundred sixty-seven".