28136903 has 2 divisors, whose sum is σ = 28136904. Its totient is φ = 28136902.

The previous prime is 28136863. The next prime is 28136951. The reversal of 28136903 is 30963182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28136903 - 2¹⁶ = 28071367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28136903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28136203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14068451 + 14068452.

It is an arithmetic number, because the mean of its divisors is an integer number (14068452).

Almost surely, 2^28136903 is an apocalyptic number.

28136903 is a deficient number, since it is larger than the sum of its proper divisors (1).

28136903 is an equidigital number, since it uses as much as digits as its factorization.

28136903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28136903 is about 5304.4229657900. The cubic root of 28136903 is about 304.1529953281.

The spelling of 28136903 in words is "twenty-eight million, one hundred thirty-six thousand, nine hundred three".