28550447 has 2 divisors, whose sum is σ = 28550448. Its totient is φ = 28550446.

The previous prime is 28550393. The next prime is 28550453. The reversal of 28550447 is 74405582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28550447 - 2²⁰ = 27501871 is a prime.

It is a super-3 number, since 3×28550447³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28550477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14275223 + 14275224.

It is an arithmetic number, because the mean of its divisors is an integer number (14275224).

Almost surely, 2^28550447 is an apocalyptic number.

28550447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28550447 is an equidigital number, since it uses as much as digits as its factorization.

28550447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 28550447 is about 5343.2618315033. The cubic root of 28550447 is about 305.6358570115.

The spelling of 28550447 in words is "twenty-eight million, five hundred fifty thousand, four hundred forty-seven".