28290047 has 2 divisors, whose sum is σ = 28290048. Its totient is φ = 28290046.

The previous prime is 28290037. The next prime is 28290061. The reversal of 28290047 is 74009282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28290047 - 2⁶ = 28289983 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28289995 and 28290022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28290007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14145023 + 14145024.

It is an arithmetic number, because the mean of its divisors is an integer number (14145024).

Almost surely, 2^28290047 is an apocalyptic number.

28290047 is a deficient number, since it is larger than the sum of its proper divisors (1).

28290047 is an equidigital number, since it uses as much as digits as its factorization.

28290047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28290047 is about 5318.8388770483. The cubic root of 28290047 is about 304.7038135136.

The spelling of 28290047 in words is "twenty-eight million, two hundred ninety thousand, forty-seven".