28475399 has 2 divisors, whose sum is σ = 28475400. Its totient is φ = 28475398.

The previous prime is 28475393. The next prime is 28475423. The reversal of 28475399 is 99357482.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28475399 - 2⁴ = 28475383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28475393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14237699 + 14237700.

It is an arithmetic number, because the mean of its divisors is an integer number (14237700).

Almost surely, 2^28475399 is an apocalyptic number.

28475399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28475399 is an equidigital number, since it uses as much as digits as its factorization.

28475399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 28475399 is about 5336.2345338263. The cubic root of 28475399 is about 305.3678228310.

The spelling of 28475399 in words is "twenty-eight million, four hundred seventy-five thousand, three hundred ninety-nine".