28144903 has 2 divisors, whose sum is σ = 28144904. Its totient is φ = 28144902.

The previous prime is 28144873. The next prime is 28144927. The reversal of 28144903 is 30944182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28144903 - 2¹³ = 28136711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28144943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14072451 + 14072452.

It is an arithmetic number, because the mean of its divisors is an integer number (14072452).

Almost surely, 2^28144903 is an apocalyptic number.

28144903 is a deficient number, since it is larger than the sum of its proper divisors (1).

28144903 is an equidigital number, since it uses as much as digits as its factorization.

28144903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28144903 is about 5305.1769998747. The cubic root of 28144903 is about 304.1818186068.

The spelling of 28144903 in words is "twenty-eight million, one hundred forty-four thousand, nine hundred three".