28790147 has 2 divisors, whose sum is σ = 28790148. Its totient is φ = 28790146.

The previous prime is 28790137. The next prime is 28790173. The reversal of 28790147 is 74109782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28790147 - 2²² = 24595843 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 28790147.

It is not a weakly prime, because it can be changed into another prime (28790137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14395073 + 14395074.

It is an arithmetic number, because the mean of its divisors is an integer number (14395074).

Almost surely, 2^28790147 is an apocalyptic number.

28790147 is a deficient number, since it is larger than the sum of its proper divisors (1).

28790147 is an equidigital number, since it uses as much as digits as its factorization.

28790147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 28790147 is about 5365.6450683958. The cubic root of 28790147 is about 306.4888131979.

The spelling of 28790147 in words is "twenty-eight million, seven hundred ninety thousand, one hundred forty-seven".